Benzene Ring Containing Patents (Class 568/17)
-
Patent number: 5288912Abstract: Disclosed is a process for the preparation of alkali metal diarylphosphide compounds wherein at least one of the aryl radicals is substituted with an alkyl group. Also disclosed is the preparation of alkyl(diaryl)phosphine compounds which are obtained by the reaction of the alkali metal diarylphosphide compounds with alkyl halide alkylating agents.Type: GrantFiled: February 12, 1993Date of Patent: February 22, 1994Assignee: Eastman Kodak CompanyInventor: Thomas J. Devon
-
Patent number: 5284977Abstract: A high-purity organic phosphine is obtained by washing organic phosphine or an organic solvent solution thereof with water, an alkaline aqueous solution or an acidic aqueous solution, whereby impurities, particularly, silicon compounds, 2-methoxy ethanol, and organic halides, contained in organic phosphine can be removed, so that such high-purity organic phosphine may be used as a raw material for high-performance compound semiconductor thin film with Groups III and V elements of the Periodic Table.Type: GrantFiled: April 28, 1992Date of Patent: February 8, 1994Assignee: Nippon Mining Company LimitedInventors: Toru Imori, Takayuki Ninomiya, Kazuhiro Kondoh, Kouichi Nakamura, Kouhei Ushikubo
-
Patent number: 5281731Abstract: A convergent synthesis of 19-nor-vitamin D compounds, specifically 19-nor-1.alpha.,25-dihydroxyvitamin D.sub.3, is disclosed. The synthesis can also readily be utilized for preparing other 1.alpha.-hydroxylated 19-nor-vitamin D compounds. The key step in the synthesis is a suitable application of Lythgoe's procedure i.e. a Horner-Wittig reaction of the lithium anion of a phosphine oxide with a Windaus Grundmann ketone to give, after any necessary deprotection, the desired 19-nor-vitamin D compound.Type: GrantFiled: November 20, 1992Date of Patent: January 25, 1994Assignee: Wisconsin Alumni Research FoundationInventors: Hector F. DeLuca, Heinrich K. Schnoes, Kato L. Perlman, Rolf E. Swenson
-
Patent number: 5268492Abstract: An optically active diphosphine having a bicyclo[2.2.1]heptane of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are difined in the specification and a metal complex comprising said optically active diphosphine are disclosed. A process for producing or purifying said optically active diphosphine is disclosed.Type: GrantFiled: August 27, 1992Date of Patent: December 7, 1993Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Keiji Yamamoto, Masahiro Miyazawa, Satoru Momose
-
Patent number: 5250736Abstract: Allylphosphines and vinylphosphines are prepared by reaction of a phosphine with an allylhalide or a vinylhalide, respectively. Preferably the phosphine is a secondary phosphine, so that there is formed an allyldialkylphosphine or a dialkylvinylphosphine. The allyldialkylphosphine can be reacted further with dialkylphosphine under free radical conditions to yield a 1,3-bis-(dialkylphosphino)propane. The dialkylvinylphosphine can be reacted further with dialkylphosphine under free radical conditions to yield a 1,2 bis-(dialkylphosphino)ethane. These compounds are useful as bidentate ligands.Type: GrantFiled: August 11, 1992Date of Patent: October 5, 1993Assignee: Cyanamid Canada Inc.Inventors: Colleen E. Micklethwaite, Allan J. Robertson
-
Patent number: 5243079Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon employs a novel catalyst composition formed from a compound of palladium, the anion of a strong non-hydrohalogenic acid and a novel hexakis phosphine ligand. The process is characterized by a lessened degree of reactor fouling.Type: GrantFiled: August 28, 1992Date of Patent: September 7, 1993Assignee: Shell Oil CompanyInventors: Johannes J. Keijsper, Alexander W. van der Made, Petrus W. N. M. van Leeuwen
-
Patent number: 5231202Abstract: A phosphine compound represented by formula (I): ##STR1## wherein Ph represents a phenyl group; and R represents a lower alkyl group or --OR.sup.1, wherein R.sup.1 represents a hydrogen atom, a cycloalkyl group having from 5 to 7 carbon atoms, or an alkyl group having from 1 to 6 carbon atoms which may be substituted with a halogen atom, a lower alkoxy group, a lower alkoxy group-substituted lower alkoxy group, or a phenyl group, and a transition metal complex using the phosphine compound (I) as a ligand are disclosed. The transition metal complex, when used as a catalyst for various enantioselective synthesis reactions, e.g., enantioselective silylation reaction, provides a desired product in high yield at high optical purity. The absolute configuration of the product can be arbitrarily selected by selecting the optical isomer of the ligand in the transition metal complex catalyst.Type: GrantFiled: March 12, 1992Date of Patent: July 27, 1993Assignee: Takasago International CorporationInventors: Tamio Hayashi, Yasuhiro Uozumi, Akiko Yamazaki, Hidenori Kumobayashi
-
Patent number: 5210311Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon comprises contacting the carbon monoxide and hydrocarbon under polymerization conditions in the presence of a reaction diluent and a novel catalyst composition formed from a palladium compound, a strong non-hydrohalogenic acid and a tetradentate aromatic phosphine ligand. The polymer products are of higher molecular weight and are produced at a faster rate than the more conventional process employing a catalyst composition formed from a bidentate ligand.Type: GrantFiled: May 28, 1991Date of Patent: May 11, 1993Assignee: Shell Oil CompanyInventor: Pui K. Wong
-
Patent number: 5169926Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon employs a novel catalyst composition formed from a compound of palladium, the anion of a strong non-hydrohalogenic acid and a novel hexakis phosphine ligand. The process is characterized by a lessened degree of reactor fouling.Type: GrantFiled: April 12, 1991Date of Patent: December 8, 1992Assignee: Shell Oil CompanyInventors: Johannes J. Keijsper, Alexander W. van der Made, Petrus W. N. M. van Leeuwen
-
Patent number: 5126473Abstract: A process is described for the hydrided of halogen-substituted compounds of the second to fourth period of Groups III to V of the periodic system, with the exception of gallium, aluminum, carbon, or nitrogen. A finely-granulated aluminum is added to a molten salt melt that consists of 50-67 molar % AlCl.sub.3 (anhydrous) and 50 to 33 molar % of sodium chloride. Then to the stirred, or by some other means dispersed suspension, hydrogen is introduced to hydrided the finely-dispersed aluminum. Thereafter the mixture is reacted with the halogen-substituted compound and the resulting hydrided compound is renewed.Type: GrantFiled: August 10, 1990Date of Patent: June 30, 1992Assignee: Degussa AktiengesellschaftInventors: Hans-Juergen Klockner, Ralf Schmoll, Peter Panster, Peter Kleinschmit
-
Patent number: 5073643Abstract: Synthesis use of a new class of diaryliodonium salt photo and thermal polymerization initiators in which the aryl groups are substituted with alkoxy group bearing hydroxy groups. Good to excellent yields are obtained of diaryliodonium salts in which the aryl groups are substituted with long chain alkoxy groups, which alkoxy groups also possess at least one hydroxyl moiety attached at the 2-position of an alkoxy group. The resultant salts have enhanced solubility when compared with their lower molecular weight counterparts. The hydroxyl groups serve as chain transfer agents; and, in cross linking UV-induced cationic polymerizations, the hydroxyl groups effect marked accelertion on polymerization rates. The salts also have excellent compatability with nonpolar monomers such as epoxidized oil and poly(1,2-butadience oxide) and provide further benefits when they are used along with copper cocatalysts in thermally curable polymer systems.Type: GrantFiled: August 30, 1990Date of Patent: December 17, 1991Assignee: Polyset CorporationInventor: James V. Crivello
-
Patent number: 5057599Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon comprises contacting the carbon monoxide and hydrocarbon under polymerization conditions in the presence of a reaction diluent and a novel catalyst composition formed from a palladium compound, a strong nonhydrohalogenic acid and a tetradentate aromatic phosphine ligand. The polymer products are of higher molecular weight and are produced at a faster rate than the more conventional process employing a catalyst composition formed from a bidentate ligand.Type: GrantFiled: March 30, 1990Date of Patent: October 15, 1991Assignee: Shell Oil CompanyInventor: Pui K. Wong
-
Patent number: 5055552Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon employs a novel catalyst composition formed from a compound of palladium, an anion of a strong non-hydrohalogenic acid and a supported bidentate ligand of phosphorus. The improved process is characterized by a reduced level of reactor fouling. The polymer products are useful as engineering thermoplastics.Type: GrantFiled: February 14, 1990Date of Patent: October 8, 1991Assignee: Shell Oil CompanyInventor: Pui K. Wong
-
Patent number: 5041676Abstract: A process for the production of highly pure alkyl and arylphosphines for gas phase epitaxy processes through the reduction of alkyl and arylphosphinic acid or alkyl and arylphosphonic acid derivatives, with substituted alkali metal aluminum hydrides in a high-boiling solvent such as 1-methylnaphthalin.Type: GrantFiled: December 15, 1989Date of Patent: August 20, 1991Inventor: Hartmut Hofmann
-
Patent number: 5026886Abstract: A process is disclosed for preparing biaryl, bidentate ligands comprising:(1) contacting a biaryl compound having the structural formula: ##STR1## with a proton abstracting agent under conditions suitable to form a biaryl dianion, which is then(2) contacted with a Group V compound of the formula: ##STR2## where X' is halogen or a suitable leaving group.Type: GrantFiled: January 25, 1988Date of Patent: June 25, 1991Assignee: Eastman Kodak CompanyInventors: Jerome L. Stavinoha, Gerald W. Phillips, Thomas A. Puckette, Thomas J. Devon
-
Patent number: 5012002Abstract: 2,2'-Bis[di-(m-tolyl)phosphino]-1,1'-binaphthyl represented by formula (I) is disclosed. ##STR1## The compound of formula (I) is capable of forming a complex with a metal, e.g., ruthenium, rhodium, and palladium, which is extremely important and industrially excellent as a catalyst for various asymmetric synthesis reactions.Type: GrantFiled: June 15, 1990Date of Patent: April 30, 1991Assignee: Takasago International CorporationInventors: Hidenori Kumobayashi, Takanao Taketomi
-
Patent number: 4959488Abstract: Polyfunctional hexasubstituted benzene derivatives wherein at least three of the substituents are saturated carbon chains having from 1 to 21 carbon atoms and functional groups containing hetero functionalities at the ends of the carbon chains and the remainder of the 6 substituents are either saturated carbon chains containing from 1 to 21 carbon atoms or saturated carbon chains containing from 1 to 21 carbon atoms having a functional group including a hetero functional group containing N, O, S, P, or Si at the end of the chains. These derivatives are made by reacting a disubstituted alkyne wherein one or both of the substituents are saturated carbon chains having 1 to 21 carbon atoms to which hetero functional groups are attached with a palladium catalyst and isolating the resulting hexasubstituted benzene derivative.Type: GrantFiled: May 17, 1989Date of Patent: September 25, 1990Assignee: Henkel Research CorporationInventors: James M. Renga, Alan G. Olivero, Mark Bosse
-
Patent number: 4956055Abstract: A process is disclosed for preparing bidentate ligands of the formula: ##STR1## wherein: each Ar is independently selected from aromatic ring compounds having 6 up to 14 carbon atoms, e.g., phenyl, naphthyl, phenanthryl and anthracenyl;the x bonds and the y bonds are attached to adjacent carbon atoms on the ring structures;each R, when present as a substituent, is independently selected from alkyl, alkoxy, aryloxy, aryl, aralyky, alkaryl, alkoxyalky, cycloaliphatic, halogen, alkanoyl, alkanoyloxy, alkoxycarbonyl, carboxyl, cyano or formyl radicals;n is a whole number in the range of 0-4 where Ar is phenyl; 0-6 where Ar is naphthyl; and 0-8 where Ar is phenanthryl or anthracenyl;each R.sub.1 and R.sub.2 is independently selected from alkyl, aryl, aralkyl, alkaryl or cycloaliphatic radicals, or substituted derivatieves thereof;each R.sub.3 and R.sub.4 is independently selected from hydrogen and the R.sub.Type: GrantFiled: July 24, 1989Date of Patent: September 11, 1990Assignee: Eastman Kodak CompanyInventor: Thomas A. Puckette
-
Patent number: 4954227Abstract: A process is disclosed for preparing bidentate ligands of the formula: ##STR1## wherein: each AR is independently selected from aromatic ring compounds having 6 up to 14 carbon atoms, e.g., phenyl, naphthyl, phenanthryl and anthracenyl;the x bonds and the y bonds are attached to adjacent carbon atoms on the ring structures;each R, when present as a substituent, is independently selected from alkyl, alkoxy, aryloxy, aryl, aralkyl, alkaryl, alkoxyalkyl, cycloaliphatic, halogen, alkanoyl, alkanoyloxy, alkoxycarbonyl, carboxyl, cyano or formyl radicals;n is a whole number in the range of 0-4 were Ar is phenyl; 0-6 where Ar is naphthyl; and 0-8 where Ar is phenanthryl or anthracenyl;each R.sub.1 and R.sub.2 is independently selected from alkyl, aryl, aralkyl, alkaryl or cycloaliphatic radicals, or substituted derivatives thereof;each R.sub.3 and R.sub.4 is independently selected from hydrogen and the R.sub.Type: GrantFiled: July 24, 1989Date of Patent: September 4, 1990Assignee: Eastman Kodak CompanyInventor: Thomas A. Puckette
-
Patent number: 4947000Abstract: An aromatic phosphine compound of the formula: ##STR1## wherein each of R.sub.1 to R.sub.3 is an aromatic group, or an oxide thereof.Type: GrantFiled: March 3, 1988Date of Patent: August 7, 1990Assignee: Tosoh CorporationInventors: Hiroshi Meguro, Hiroshi Ohrui, Kazuaki Akasaka
-
Patent number: 4900854Abstract: Process for the preparation of asymmetrical alkaline earth metal organoborates and organoaluminates represented by the formula I: ##STR1## and asymmetrical alkaline earth metal organoarsenates and organophosphates represented by the formula II: ##STR2## wherein Z is selected from the group consisting of boron and aluminum; X is selected from the group consisting of phosphorus and arsenic; M is an alkaline earth metal; and in which R.sub.1 -R.sub.6 are independently selected from alkyl, aryl, alkaryl, aralkyl, alkenyl, cycloalkyl, and cyano with the proviso that R.sub.1 -R.sub.6 are not all the same.Type: GrantFiled: December 8, 1988Date of Patent: February 13, 1990Assignee: The Dow Chemical CompanyInventors: Richard C. Winterton, Ronald J. Hoffman, Thomas D. Gregory
-
Patent number: 4892944Abstract: A process for producing quaternary salts of high purity is disclosed, comprising reacting a tertiary amine or phosphine with a carbonic acid diester to form a corresponding quaternary carbonate and further mixing it with an acid to perform decarboxylation. The quaternary salts thus obtained are useful compounds which can be used in wide fields as various catalysts, electrolytes, additives, medicaments, etc.Type: GrantFiled: May 11, 1988Date of Patent: January 9, 1990Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Shoichiro Mori, Kazuhiko Ida, Makoto Ue
-
Patent number: 4879008Abstract: A process is disclosed for preparing bidentate ligands of the formula: ##STR1## wherein: each Ar is independently selected from aromatic ring compounds having 6 up to 14 carbon atoms, e.g., phenyl, naphthyl, phenanthryl and anthracenyl;the x bonds and y bonds are attached to adjacent carbon atoms on the ring structure;each R, when present as a substituent, is independently selected from alkyl, alkoxy, aryloxy, aryl, aralkyl, alkaryl, alkoxyalkyl, cycloaliphatic, halogen, alkanoyl, alkanoyloxy, alkoxycarbonyl, carboxyl, cyano or formyl radicals;n is a whole number in the range of 0-4 were Ar is phenyl; 0-6 where Ar is naphthyl; and 0-8 where Ar is phenanthryl or anthracenyl;each R.sub.1 and R.sub.2 is independently selected from alkyl, aryl, aralkyl, alkaryl or cycloaliphatic radicals, or substituted derivatives thereof;each R.sub.3 and R.sub.4 is independently selected from hydrogen and the R.sub.Type: GrantFiled: November 9, 1987Date of Patent: November 7, 1989Assignee: Eastman Kodak CompanyInventor: Thomas A. Puckette
-
Patent number: 4879416Abstract: The process for preparing a bidentate ligand comprising the steps,(1) contacting with ozone under ozonolysis conditions a suspension in a hydroxylic reaction medium of phenanthrene or a phenanthrene derivative to form an ozonated intermediate,(2) contacting said ozonated intermediate with a reducing agent under conditions appropriate to form the corresponding diol,(3) contacting said diol with a latent displaceable functional group under conditions appropriate to convert the diol to the corresponding difunctional biaryl compound, and(4) contacting said difunctional biaryl compound, with an anion of N, P, As, Sb or Bi under conditions appropriate to form the desired bidentate ligand.Type: GrantFiled: November 23, 1987Date of Patent: November 7, 1989Assignee: Eastman Kodak CompanyInventors: Thomas A. Puckette, Thomas J. Devon, Gerald W. Phillips, Jerome L. Stavinoha
-
Patent number: 4851581Abstract: A novel ligand for use in hydroformylation reactions wherein at least one olefin having from 2 to 20 carbon atoms is contacted in a reaction zone at a temperature of from about 20.degree. C. to about 250.degree. C. and a pressure of from about 50 psig to about 800 psig with hydrogen, carbon monoxide, and a catalyst containing rhodium, the ligand having the formula ##STR1## wherein: n is 1-4;each R is independently selected from hydrogen, alkyl, alkoxy, aryloxy, aryl, aralky, alkaryl, alkoxyalkyl, cycloaliphatic, halogen, alkanoyl, alkanoyloxy, alkoxycarbonyl, carboxyl or cyano;each R.sub.1 and R.sub.2 is independently selected from alkyl, aryl, aralkyl, alkaryl or cycloaliphatic;each R.sub.3 and R.sub.4 is independently selected from hydrogen and the R.sub.1 substituents; andeach Y is independently selected from the elements N, P, As, Sb and Bi.Type: GrantFiled: June 11, 1987Date of Patent: July 25, 1989Assignee: Eastman Kodak CompanyInventors: Thomas J. Devon, Gerald W. Phillips, Thomas A. Puckette, Jerome L. Stavinoha, Jeffrey J. Vanderbilt
-
Patent number: 4845306Abstract: Disclosed is a process for recovering or concentrating active catalyst materials from a substantially homogeneous system comprising:(a) active catalyst materials which comprise(i) triorganophosphine-rhodium complexes, and(ii) free triorganophosphine;(b) oxidized triorganophosphine residues,(c) iron carboxylate salts,(d) pump oils, and(e) aldehydes and aldol condensation products thereof;said processing comprising:(1) admixing a portion of said homogeneous system with about 1 up to 100 volumes (relative to the volume of said portion) of at least one nonpolar hydrophobic hydrocarbon diluent selected from the group consisting of saturated or unsaturated aliphatic hydrocarbon having in the range of 3 up to 20 carbon atoms and aromatic or hydrocarbyl-substituted aromatic hydrocarbons having in the range of 6 up to 22 carbon atoms to produce a diluted homogeneous system,(2) contacting said diluted homogeneous system with 0.Type: GrantFiled: July 12, 1988Date of Patent: July 4, 1989Assignee: Eastman Kodak CompanyInventor: Thomas A. Puckette
-
Patent number: 4835202Abstract: (Hydroxyphenyl)phosphine derivatives of the formula ##STR1## are effective in stabilizing organic materials against oxidative, thermal and actinic degradation, said derivatives being particularly effective as process stabilizers in organic materials containing phenolic antioxidants.Type: GrantFiled: November 20, 1987Date of Patent: May 30, 1989Assignee: Ciba-Geigy CorporationInventors: Stephen D. Pastor, John D. Spivack, Edward T. Hessell
-
Patent number: 4824977Abstract: A hydroformylation process including contacting hydroformylation stock in a reaction zone at a temperature of from about 20.degree. C. to about 250.degree. C. and a pressure of from about 15 psig to about 800 psig with hydrogen and carbon monoxide wherein the catalyst comprises rhodium in chemical complex with one or more ligands of the formulae ##STR1## wherein: Z, when present, represents the atoms necessary to form with adjacent carbons on the benzene nucleus a fused divalent ring structure having up to about 20 ring carbons;each ring is either unsubstituted or one or more of the hydrogens thereof is replaced with a substituent R selected independently from alkyl, alkoxy, aryloxy, aryl, aralkyl, alkaryl, alkoxyalkyl, cycloaliphatic, halogen, alkanoyl, alkanoyloxy, alkoxycarbonyl, carboxyl or cyano;each R.sub.1 and R.sub.Type: GrantFiled: March 11, 1988Date of Patent: April 25, 1989Assignee: Eastman Kodak CompanyInventors: Thomas J. Devon, Gerald W. Phillips, Thomas A. Puckette, Jerome L. Stavinoha, Jr., Jeffrey J. Vanderbilt
-
Patent number: 4822915Abstract: An oligomerization or cooligomerization process comprising passing ethylene or a mixture of ethylene and propylene in contact with a catalyst, in the liquid phase.Type: GrantFiled: May 26, 1987Date of Patent: April 18, 1989Assignee: Union Carbide CorporationInventor: Rex E. Murray
-
Patent number: 4734514Abstract: Organometallic compounds having the formulas: ##STR1## wherein N is selected from phosphorus and arsenic, H is hydride, and X and Y are independently selected from hydride, lower alkyl cyclopentadienyl, and phenyl, except that Y cannot be hydrogen; andMR.sub.xwherein x is an integer from 2 to 4 inclusive, each said R substituent is independently selected from hydride, lower alkyl, phenyl, alkyl-substituted phenyl, cyclopentadienyl, and alkyl-substituted cyclopentadienyl, and M is selected from elements of Groups 2B, 2A, 3A, 5A, and 6A of the Periodic Table, except carbon, nitrogen, oxygen, and sulfur. The use of these compounds in chemical vapor deposition processes and methods for synthesizing these compounds are also disclosed.Type: GrantFiled: February 10, 1986Date of Patent: March 29, 1988Assignee: Morton Thiokol, Inc.Inventors: Andreas A. Melas, Benjamin C. Hui, Jorg Lorberth
-
Patent number: 4731484Abstract: New compounds which are 4,4'-bis(trihaloacetyl) derivatives of aromatic compounds have been prepared by reacting an aromatic compound with a haloacetyl halide in the presence of a Friedel-Crafts catalyst, e.g. AlCl.sub.3, in a suitable solvent. The compounds are useful in preparing polycarbonates, polyesters, polyamides, polyketones and polyurethanes.Type: GrantFiled: April 30, 1986Date of Patent: March 15, 1988Assignee: The Dow Chemical CompanyInventor: Marlin E. Walters
-
Patent number: 4710587Abstract: A process for selectively removing alkyl substituted phosphine from an organic liquid containing same and triarylphosphine by treating said liquid with phosphoric acid.Type: GrantFiled: August 2, 1985Date of Patent: December 1, 1987Assignee: Union Carbide Corp.Inventors: David R. Bryant, Richard A. Galley
-
Patent number: 4708824Abstract: Chloro(diphenyl)phosphine, (C.sub.6 H.sub.5).sub.2 PCl, is prepared by reaction of diphenylphosphinic acid chloride with triphenylphosphine at temperatures between about 300.degree. and about 600.degree. C. The initial P-O compound undergoes deoxygenation during the reaction.The product of the process is useful as an intermediate in various specialized areas such as the plant-protection and polymer sectors.Type: GrantFiled: June 28, 1985Date of Patent: November 24, 1987Assignee: Hoechst AktiengesellschaftInventor: Hans-Jerg Kleiner
-
Patent number: 4698448Abstract: Compounds of the formula ##STR1## wherein R is lower alkyl or aryl, Y is oxygen or sulfur, m is 0 or 1, Ar is arylene, and X is halogen, methyl, or aryloxy, or polymers containing repeating units of this kind are prepared from a compound R--P(Y).sub.r Cl.sub.2, where r is 0 or 1 but is never greater than m, by reaction with one or two molar parts of a compound H--ArX in the presence of a Friedel-Crafts catalyst.Type: GrantFiled: July 2, 1985Date of Patent: October 6, 1987Assignee: Rohm GmbHInventors: Werner Ude, Siegmund Besecke, Achim Riemann, Guenther Schroeder
-
Patent number: 4681693Abstract: New products having the structure of arylphosphines or of derivatives of arylphosphines with an oxygen or sulphur atom directly bonded to the phosphorus atom, containing perfluoroalkylether chains, characterized in that such chains are bonded to the benzene ring through a non-perfluorinated bridge, and are obtained by a process substantially decreasing their production costs, and suitable to be used as stabilizers of perfluoropolyether oils and greases to prevent their degradation in the presence of metals, and the corrosion of the same metals, such as, e.g., Al, Ti, V, or their alloys, when operating in oxidizing and high-temperature environments.Type: GrantFiled: April 23, 1986Date of Patent: July 21, 1987Assignee: Ausimont S.p.A.Inventors: Piero Gavezotti, Ezio Strepparola
-
Patent number: 4668823Abstract: A process for the selective production of bulky alkyldiarylphosphines and unsymmetrical dialkylarylphosphines comprising reacting a first Grignard reagent having a bulky alkyl group with an aryldichlorophosphine and thereafter and without isolating the resulting bulky alkylarylchlorophosphine intermediate, reacting said intermediate with a second Grignard reagent having a different, less bullky alkyl group or an aryl group to provide the product phosphine.Type: GrantFiled: December 30, 1983Date of Patent: May 26, 1987Assignee: Union Carbide CorporationInventor: Rex E. Murray
-
Patent number: 4647702Abstract: A method for the dehydroxylation of alpha-hydroxyketone using lithium diphenylphosphide. The alpha-hydroxyketone, e.g. benzoin, is reacted with a solution of lithium diphenylphosphide followed by the addition of either an alkyl halide, e.g. methyliodide, or an alkyl halide and an organic acid, e.g. acetic acid, to yield the dehydroxylated compound, e.g. desoxybenzoin.Type: GrantFiled: November 18, 1985Date of Patent: March 3, 1987Assignee: Stauffer Chemical CompanyInventor: Andrea Leone-Bay
-
Patent number: 4632995Abstract: Organic chlorophosphanes of the formula II ##STR1## in which R.sup.1 =an aromatic or heterocyclic radical and R.sup.2 =an aliphatic radical or Cl are prepared by reacting organic phosphorus oxychlorides of the formula I ##STR2## in which R.sup.1 and R.sup.2 have the meaning mentioned above with triphenylphosphane (C.sub.6 H.sub.5).sub.3 P at an elevated temperature. The organic chlorophosphanes II are, in the main, intermediates in various specialized fields, such as the pharmaceuticals, plant protection, dyestuffs and polymers sectors.Type: GrantFiled: April 12, 1984Date of Patent: December 30, 1986Assignee: Hoechst AktiengesellschaftInventor: Hans-Jerg Kleiner
-
Patent number: 4618720Abstract: An improved process is disclosed for preparing alkyldiarylphosphines and related compounds. Typically, diphenylphosphinous chloride is reacted in solution with an excess of an alkali metal; and the reaction product reacted with chlorohexane thereby forming hexyldiphenylphosphine. The improved process obtains greater yields, by use of critical amounts of alkali metal; use of a single reactor rather than two reactors; preinitiation of the first stage reaction; reduction of temperatures to increase reaction rate under certain conditions; and preferred reactants and physical form thereof. Novel products include behenyldiphenylphosphine.Type: GrantFiled: March 4, 1985Date of Patent: October 21, 1986Assignee: Stauffer Chemical CompanyInventors: W. Elliott Bay, Karl E. Reineke, Edward D. Weil
-
Patent number: 4618719Abstract: There is disclosed an improved process for the addition of phospines to alpha-olefins at high yields and conversions. The process involves the absence of a catalyst whose residues could interfere with the utility of the product, such as n-hexyldiphenylphosphine, as a ligand. Simple thermal reaction is used at temperatures of at least 200.degree. C., most preferably 250.degree. C.-350.degree. C. The pressure is preferably at least atmospheric. Preferred reactants, products, and processing conditions are also disclosed. Batch processes are exemplified and continuous processes proposed.Type: GrantFiled: March 4, 1985Date of Patent: October 21, 1986Assignee: Stauffer Chemical CompanyInventors: W. Elliot Bay, Karl E. Reineke
-
Patent number: 4556740Abstract: Novel chiral phosphorus compounds of the general formula ##STR1## wherein R signifies substituted or unsubstituted phenyl, R.sup.1 and R.sup.2, which can be the same or different, signify hydrogen, lower alkyl, lower alkoxy, di-lower alkylamino or protected hydroxymethyl or R.sup.1 and R.sup.2 together signify the group ##STR2## in which m represents a number 3 to 5, R.sup.4 represents lower alkyl, substituted or unsubstituted phenyl or benzyl and R.sup.5 represents lower alkyl or both R.sup.5 's together represent lower alkylene, R.sup.3 signifies methyl, lower alkoxy, di-lower alkylamino or fluorine and n signifies the number 0, 1, 2 or 3, are described.The compounds of formula I are useful in the form of complexes with a metal of Group VIII as catalysts for asymmetric hydrogenations and enantioselective hydrogen displacements in prochiral allylic systems.Type: GrantFiled: August 19, 1983Date of Patent: December 3, 1985Assignee: Hoffmann-La Roche Inc.Inventors: Hans-Jurgen Hansen, Rudolf Schmid
-
Patent number: 4540823Abstract: Novel advanced epoxy resins are prepared using phosphine or phosphonium salt initiators bearing at least one hydroxyphenyl or thiophenyl groups. These phosphonium salt initiators are novel compositions of matter. The resulting resins contain reduced quantities of extractable phosphorus containing moieties.Type: GrantFiled: June 15, 1984Date of Patent: September 10, 1985Assignee: The Dow Chemical CompanyInventors: George A. Doorakian, Joseph W. Hanafin
-
Patent number: 4537725Abstract: New diaryliodosyl salts have the formula ##STR1## where R.sup.7 and R.sup.8, which may be the same or different, each represent a monovalent aromatic radical of from 6 to 22 carbon atoms,Z.sup.t- denotes a t-valent anion of formula MX.sub.n.sup.- or R.sup.9 SO.sub.3.sup.- or a t-valent anion of a halogen-free inorganic oxy acid,t is 1, 2 or 3,M represents an atom of a metal or metalloid,X denotes a halogen atom, preferably of fluorine or chlorine,n is 4, 5, or 6 and is one more than the valency of M, with the proviso that MX.sub.n.sup.- can represent SbOHF.sub.5.sup.-, andR.sup.9 denotes a monovalent aliphatic or aromatic group of 1 to 20 carbon atoms.These salts have utility as photocuring catalysts for cationically polymerizable materials such as epoxide resins and phenolic resins.Type: GrantFiled: September 9, 1983Date of Patent: August 27, 1985Assignee: Ciba-Geigy CorporationInventor: Edward Irving
-
Patent number: 4526776Abstract: An hepatobiliary imaging agent is disclosed which is a cationic complex of Tc-99m, a cyanate or thiocyanate ion, and a mono or polydentate organic ligand having one or more donor atoms, each with a free-electron pair available for accepting a proton or for complexing with Tc-99m to form a cationic complex. These complexes can provide images of the hepatobiliary transit in as little as ten minutes.Type: GrantFiled: April 15, 1983Date of Patent: July 2, 1985Assignee: E. I. du Pont de Nemours & CompanyInventors: Vinayakam Subramanyam, Algis Rajeckas
-
Patent number: 4514575Abstract: Tertiary phosphine oxides, such as triphenylphosphine oxide, are reduced to the corresponding phosphines with trichlorosilane in an inert halogenated hydrocarbon solvent.Type: GrantFiled: November 25, 1983Date of Patent: April 30, 1985Assignee: Ethyl CorporationInventors: John Y. Lee, Dennis P. Bauer
-
Patent number: 4512967Abstract: A cationic lipophilic complex of technetium is disclosed wherein all of the coordination positions of the technetium atom are filled with a neutral donor atom having a pair of electrons available for forming a coordinate bond with technetium. The donor atoms are provided by target-seeking ligands or salts thereof, said ligands having the following structure of one of formulas I, II or III. Such complexes are useful for imaging heart and hepatobiliary tissues.Type: GrantFiled: August 2, 1982Date of Patent: April 23, 1985Assignee: E. I. Du Pont de Nemours and CompamyInventor: Karen E. Linder
-
Patent number: 4507503Abstract: Tertiary phosphine oxides, such as triphenylphosphine oxide, are reduced to the corresponding phosphines in the presence of a trialkylaluminum/trialkyl borate reducing agent.Type: GrantFiled: November 25, 1983Date of Patent: March 26, 1985Assignee: Ethyl CorporationInventors: Frederick W. Frey, John Y. Lee
-
Patent number: 4507504Abstract: Tertiary phosphine oxides, such as triphenylphosphine oxide, are reduced to the corresponding phosphines in the presence of a trialkylaluminum/boron trihalide reducing agent.Type: GrantFiled: November 25, 1983Date of Patent: March 26, 1985Assignee: Ethyl CorporationInventors: John Y. Lee, Frederick W. Frey
-
Patent number: 4507502Abstract: A tertiary phosphine oxide, such as triphenylphosphine oxide, is reduced to the corresponding tertiary phosphine in the presence of a sodium aluminum hydride/sodium aluminum chloride reducing agent.Type: GrantFiled: October 26, 1983Date of Patent: March 26, 1985Assignee: Ethyl CorporationInventor: Gunner E. Nelson
-
Patent number: RE32826Abstract: A cationic lipophilic complex of technetium is disclosed wherein all of the coordination positions of the technetium atom are filled with a neutral donor atom having a pair of electrons available for forming a coordinate bond with technetium. The donor atoms are provided by target-seeking ligands or salts thereof, said ligands having the following structure of one of formulas I, II or III. Such complexes are useful for imaging heart and hepatobiliary tissues.Type: GrantFiled: February 6, 1987Date of Patent: January 10, 1989Assignee: E. I Du Pont de Nemours and CompanyInventor: Karen E. Linder