Thiol Or Plural Thioethers Containing Patents (Class 568/57)
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Patent number: 5600035Abstract: Photoreactive compounds are synthesized from 2,5- or 2,6-dintrobenzyl groups. Also disclosed are methods of synthesizing reactive monomers containing 2,5- or 2,6-dintrobenzyl groups.Type: GrantFiled: July 13, 1994Date of Patent: February 4, 1997Assignee: PPG Industries, Inc.Inventors: Charles F. Kahle, II, Neil D. McMurdie, Raphael O. Kollah, Daniel E. Rardon, Gregory J. McCollum
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Patent number: 5534557Abstract: The composition of the present invention is excellent in compatibility, transparency and curability and give a cured coat of excellent gloss and of less smell, and cured products of excellent properties can be obtained by curing the composition.The present invention relates to an onium salt represented by the following formula (1): ##STR1## wherein Ar is a mono- to tetra-valent aromatic group, X is a bisphenylsulfonio group which may have a substituent, a is 1-4, b is 0 or 1-3, a+b is 1-4, n is 1-4, and Z is a halide represented by the following formula (3): ##STR2## where M is a boron atom, a phosphorus atom, an arsenic atom or an antimony atom, Q is a halogen atom, m is 3-6, l is 0 or 1, and m+l is 4-6; a photopolymerization initiator containing the onium salt as an active ingredient; an energy ray-curable composition containing the initiator; and a cured product.Type: GrantFiled: June 2, 1995Date of Patent: July 9, 1996Assignee: Nippon Kayaku Kabushiki KaishaInventors: Tetsuya Abe, Kazuhiko Ishii, Minoru Yokoshima
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Patent number: 5498730Abstract: The present invention provides fluorinated alkyl compound derivatives represented by formula of: ##STR1## wherein: R is C.sub.2-4 lower alkyl, cyclohexyl or thiophene; phenyl substituted with hydrogen, C.sub.1-6 alkyl, haloalkyl, halogen or alkoxy; and,R.sub.f is fluorinated C.sub.1-3 lower alkyl.The fluorinated alkyl compound derivatives of the invention can be used as agrochemicals, drugs and intermediates therefor. The present invention also provides a novel process for preparing the fluorinated alkyl compound derivatives (I).Type: GrantFiled: July 26, 1994Date of Patent: March 12, 1996Assignee: Korea Research Institute of Chemical TechnologyInventors: Kwang-Yun Cho, Bum-Tae Kim, Young-Sup Kim, Yong-Ki Min, No-Kyun Park, In-Howa Jeong
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Patent number: 5478959Abstract: A method for preparing 1,4-(Z,Z)-disubstituted-1,4-disulfurated-1,3-butadienes is disclosed. The butadienes can be further elaborated to provide 3,6-unsymmetrically-substituted-1,2-dithiins. Also disclosed are butadienes prepared by the method of the invention. These butadienes are useful as intermediates in the synthesis of antibiotic 1,2-dithiins.Type: GrantFiled: October 5, 1994Date of Patent: December 26, 1995Assignee: The Research Foundation of State University of New YorkInventors: Eric Block, Chuangxing Guo
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Patent number: 5380900Abstract: Disclosed herein is an .alpha.-methylene-cyclopentanone derivative represented by the formula [I] below which is useful as an intermediate for pharmaceuticals and insecticides, especially prostaglandins. Also disclosed herein is a process for producing the derivative advantageously on an industrial scale. ##STR1## where X denotes (.alpha.-OZ, .beta.-H) or (.alpha.-H, .beta.-OZ), with Z representing a protecting group for the hydroxyl group; U denotes (.alpha.-H, .beta.-R.sup.1) or (.beta.-R.sup.1, .alpha.-H); R.sup.1 denotes ##STR2## where R.sup.2 denotes a protected hydroxyl group, a substituted or unsubstituted C.sub.1-15 alkyl group, a substituted or unsubstituted C.sub.2-15 alkenyl group, a substituted or unsubstituted C.sub.2-15 alkynyl group, or a substituted or unsubstituted C.sub.6-15 aryl group; Z' denotes a protecting group for the hydroxyl group; and k is 0 or 1).Type: GrantFiled: February 12, 1992Date of Patent: January 10, 1995Assignee: Nissan Chemical Industries, LimitedInventors: Fumie Sato, Kazutaka Arai, Katsuaki Miyaji
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Patent number: 5371284Abstract: Phenyl acetylenic acetals and thioacetals and their use in the treatment of allergy, asthma, inflammation, arthritis, hyperproliferative skin disease, psoriasis or contact dermatitis are disclosed. Also disclosed are intermediates useful for producing said phenyl acetylenic acetals and thioacetals.Type: GrantFiled: July 23, 1993Date of Patent: December 6, 1994Assignee: Schering CorporationInventors: Richard J. Friary, Michael J. Green, Anil K. Saksena, Vera A. Seidl
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Patent number: 5354511Abstract: Compounds having non-linear optical activity of the general formula ##STR1## wherein D and A are electron donor and acceptor groups, respectively, R.sup.1 and R.sup.2 are aromatic bridging groups, X and Y are preferably groups capable of partaking in polymerization reactions are suitable for use in polymer-based light modulator devices.Type: GrantFiled: November 27, 1992Date of Patent: October 11, 1994Assignee: AlliedSignal Inc.Inventors: Chengjiu Wu, Jianhui Shan, Ajay Nahata
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Patent number: 5352758Abstract: A mercapto compound represented by the following formula (1): ##STR1## is obtained by reacting, in the presence of a mineral acid, thiourea with a compound represented by the following formula (2): ##STR2## wherein X means a hydroxyl group or a chlorine or bromine atom, and then adding a base to alkalinize the reaction mixture so that the reaction product is hydrolyzed.The mercapto compound represented by the formula (1) can be reacted with at least one cyanate compound selected from the group consisting of polyisocyanate compounds, polyisothiocyanate compounds and isocyanate-group-containing isothiocyanate compounds to form a sulfur- containing urethane resin. A lens made of the resin is colorless and transparent, has high refractive index and low dispersion characteristics, and is excellent especially in heat resistance.Type: GrantFiled: December 20, 1993Date of Patent: October 4, 1994Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Yoshinobu Kanemura, Katsuyoshi Sasagawa, Seiichi Kobayashi
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Patent number: 5321046Abstract: Disclosed herein are novel unsymmetrical dithiol ketals which are useful in the treatment or prevention of hypercholesterolemia, hyperlipoproteinemia, and atherosclerosis.Type: GrantFiled: October 27, 1992Date of Patent: June 14, 1994Assignee: Bristol-Myers Squibb CompanyInventors: Sing-Yuen Sit, John J. Wright, Jeff A. Field
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Patent number: 5302757Abstract: A composition of matter including an onium salt and a method of forming images. The onium salt has a chromophore which absorbs ultraviolet radiation, an S, Se, As, N or P atom which is free of substituents exhibiting a higher energy occupied molecular orbital than the chromophore; an insulating group which links the chromophore to the S, Se, As, N or P atom of the salt and substantially prevents .pi. resonance from the chromophore through the S, Se, As, N or P atom; and an anion. The onium salt is capable of forming a Bronsted acid upon exposure to ultraviolet radiation in the presence of a proton source. In the method of forming images, the onium salt is exposed to ultraviolet radiation in the presence of a proton source, to convert said onium salt to a Bronsted acid.Type: GrantFiled: September 14, 1992Date of Patent: April 12, 1994Assignee: Eastman Kodak CompanyInventor: Franklin D. Saeva
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Patent number: 5283312Abstract: A mercapto compound represented by the following formula (1): ##STR1## is obtained by reacting, in the presence of a mineral acid, thiourea with a compound represented by the following formula (2): wherein X means a hydroxyl group or a chlorine or bromine atom, and then adding a base to alkalinize the reaction mixture so that the reaction product is hydrolyzed.The mercapto compound represented by the formula (1) can be reacted with at least one cyanate compound selected from the group consisting of polyisocyanate compounds, polyisothiocyanate compounds and isocyanate-group-containing isothiocyanate compounds to form a sulfur-containing urethane resin lens made of the resin is colorless and transparent, has high refractive index and low dispersion characteristics, and is excellent especially in heat resistance.Type: GrantFiled: August 4, 1992Date of Patent: February 1, 1994Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Yoshinobu Kanemura, Katsuyoshi Sasagawa, Seiichi Kobayashi
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Patent number: 5254708Abstract: The present invention relates to substituted cyclopentanone and cyclohexanone derivatives and substituted cyclopentenone and cyclohexenone derivatives, which are useful as intermediates for pharmaceutical products and agricultural chemicals and especially useful for the synthesis of prostaglandins, and also to a process for producing the same.Type: GrantFiled: December 14, 1990Date of Patent: October 19, 1993Assignee: Nissan Chemical Industries, Ltd.Inventors: Fumie Sato, Kazutaka Arai, Katsuaki Miyaji
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Patent number: 5231221Abstract: Compounds of the formula ##STR1## can advantageously be prepared by reacting compounds the formula II ##STR2## in which the substituents R.sup.1 -R.sup.4 have the meanings given, with the anhydride of the formula III ##STR3## in the presence of dimethyl sulfoxide and the acid corresponding to the anhydride of the formula III.Type: GrantFiled: March 18, 1991Date of Patent: July 27, 1993Assignee: Hoechst AktiengesellschaftInventors: Winfried Hertzsch, Gerhard Jahne
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Patent number: 5231208Abstract: The present invention relates to substituted cyclopentanone and cyclohexanone derivatives and substituted cyclopentenone and cyclohexenone derivatives, which are useful as intermediates for pharmaceutical products and agricultural chemicals and especially useful for the synthesis of prostaglandins, and also to a process for producing the same.Type: GrantFiled: December 14, 1990Date of Patent: July 27, 1993Assignee: Nissan Chemical Industries, Ltd.Inventors: Fumie Sato, Kazutaka Arai, Katsuaki Miyaji
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Patent number: 5225472Abstract: A method and composition for decreasing the viscosity of mercaptan terminated polymers. The method involves adding thiol terminated trithio-orthoformate polycondensates to the mercaptan terminated polymer to achieve desired decreases in viscosities without adversely affecting other physical properties. The polycondensates have the formula(HS--R--S--).sub.2 CH--S--R'--S[--CH(--S--R"--S).sub.2 --].sub.n (H).sub.xwherein R, R', and R" are alkylene, arylene, alkylene thioether, or alkylene ether, either the same or different; n is 0-10; and x is n+1.Type: GrantFiled: May 19, 1992Date of Patent: July 6, 1993Assignee: Courtaulds Aerospace, Inc.Inventors: Randy Cameron, Jonathan Zook
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Patent number: 5225508Abstract: Disclosed are a diethylenicallyunsaturated monomer represented by the following formula [Ia]: ##STR1## wherein n is an integer of from 1 to 10, and a and b each represent 0 or an integer of from 1 to 4,and an optical resin which is substantially insoluble and infusible and has a refractive index .eta..sub.D of at least 1.62, and which is obtained by polymerizing a monomer comprising 50 to 100% by weight of this diethylenically unsaturated monomer.Type: GrantFiled: June 5, 1991Date of Patent: July 6, 1993Assignee: Mitsubishi Petrochemical Company LimitedInventors: Yutaka Tamura, Fumie Watari
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Patent number: 5216181Abstract: Liquid telechelic polymers are made from dienes and are produced via anionic polymerization. While having low molecular weight, for example less than 15,000, the telechelic polymers are generally gel-free, have high amounts of trans-1,4 structure, low vinyl unsaturation and low bulk viscosities. The liquid telechelic polymers are made utilizing a trimetallic initiator comprised of (1) an organopolylithium compound and (2) a complex of a trialiphatic substituted aluminum compound or derivative thereof and a barium salt of an organic alcohol.Type: GrantFiled: August 26, 1991Date of Patent: June 1, 1993Assignee: GenCorp Inc.Inventors: I. Glen Hargis, Hubert J. Fabris, John A. Wilson, Russell A. Livigni
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Patent number: 5196536Abstract: A novel class of cross-linking agent, which comprises a monomeric organic compound having at least two hydroxyl groups each bonded to a different carbon atom, wherein said hydroxyl groups are activated by reaction with 2-fluoro-1-methylpyridinium toluene-4-sulfonate (FMP). Suitable monomeric organic compounds include diols and polyols. Such cross-linking agents may be conveniently prepared by reaction of the monomeric organic compound with FMP in a suitable solvent, followed by recovery of the resultant reaction products, e.g., via precipitation and filtration. The novel cross-linking agents have a wide variety of uses, including the interconnection of subunits of multimeric enzymes and the covalent immobilization of organic ligands to suitable carriers or supports.Type: GrantFiled: April 16, 1992Date of Patent: March 23, 1993Assignee: UniSyn Fibertec CorporationInventors: That T. Ngo, Faizy Ahmed
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Patent number: 5191055Abstract: The present invention relates to a mercapto compound, a process for preparing the mercapto compound, a process for preparing a polythiourethane base resin containing the mercapto compound, and a process for preparing plastic lenses containing the resin.Type: GrantFiled: May 20, 1992Date of Patent: March 2, 1993Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Yoshinobu Kanemura, Katsuyoshi Sasagawa, Masao Imai, Toshiyuki Suzuki
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Patent number: 5180852Abstract: A bis(organothio) alkane, such as 1,2-bis(methylthio) hexane, is synthesized by reacting an alkene, such as 1-hexene, with an excess amount of a disulfide thiolating agent, such as dimethyl disulfide, in the presence of a catalytic amount of a catalyst, such as a boron trifluoride dialkyl etherate. The reaction can be carried out at from about 20.degree. to about 150.degree. C. and under a pressure of from about 0 to 20 atms. The bis(organothio) alkane is useful in ore flotation process as a flotation agent for ores containing metal sulfide minerals.Type: GrantFiled: February 19, 1992Date of Patent: January 19, 1993Assignee: Phillips Petroleum CompanyInventor: James E. Shaw
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Patent number: 5169989Abstract: An improved process for preparing a polyether polyol of reduced scorching properties comprising buffering of the alkaline polyether polyol before heating to remove water, and the use of said polyether polyol to prepare flexible foam slabstocks.Type: GrantFiled: March 1, 1991Date of Patent: December 8, 1992Assignee: Miles Inc.Inventors: Alfred L. Peterson, Mark S. Solomon, Kenneth E. Reed, Edward P. Squiller
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Patent number: 5100460Abstract: Herbicides of formula: ##STR1## in which: n=0,1, 2f=0,1A is chosen from the groups ##STR2## in which: Ar is chosen from the groups ##STR3## B is chosen from optionally substituted C.sub.1 -C.sub.10 alkyl and C.sub.3 -C.sub.Type: GrantFiled: July 13, 1989Date of Patent: March 31, 1992Assignee: Rhone-Poulenc AgrochimieInventors: Philippe Desbordes, Michel Euvrard
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Patent number: 5087758Abstract: The present invention relates to a mercapto compound, a process for preparing the mercapto compound, a process for preparing a polythiourethane base resin containing the mercapto compound, and a process for preparing plastic lenses containing the resin.Type: GrantFiled: August 29, 1989Date of Patent: February 11, 1992Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Yoshinobu Kanemura, Katsuyoshi Sasagawa, Masao Imai, Toshiyuki Suzuki
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Patent number: 5032380Abstract: Fluorescence properties of the product of the reaction of the 2-naphthalenethiolate ion and 2-chloroethylethylsulfide or bis(2-chloroethyl)sulfide are described. The fluorescence of the latter reaction is used as the basis of a new detection method for 2-chloroethylethylsulfide. The detection method is capable of detecting 2-chloroethylethylsulfide at levels down to 0.2 micrograms per milliliter.Type: GrantFiled: March 5, 1990Date of Patent: July 16, 1991Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Thaddeus Novak, Paul M. Davis
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Patent number: 5012001Abstract: Triarylsulfonium polyfluoro metal or metalloid salts are provided by effecting the oxidation of a diarylsulfide, while under dehydrating conditions, in the presence of a strong protonic acid. The resulting triarylsulfonium acid salt can thereafter be directly metathesized with an alkali metal or alkaline earth metal polyhalo salt.These compounds have the general formula ##STR1## where Q is selected from .dbd.S.fwdarw.O, --S-- and mixtures thereof, M is a transition metal or metalloid, "c" is an integer of 1 to 3, "d" is an integer of 0 to 3, R.sup.6 is phenyl or naphthyl, R.sup.7 is phenylene or naphthalene optionally substituted with one or more radicals selected from the class consisting of --CH.sub.3, --OCH.sub.3, --CO.sub.2 H, --Br, --Cl, and NO.sub.2.Type: GrantFiled: April 30, 1990Date of Patent: April 30, 1991Assignee: General Electric CompanyInventor: James V. Crivello
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Patent number: 5008430Abstract: The invention relates to mercaptopyrenes of the formula ##STR1## in which n denotes a whole number from 3 to 10 andR stands for a substitute or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl, aralkyl or aryl radicalto a process for its preparation, its use for the preparation of CT complexes and to the CT complexes obtained.Type: GrantFiled: April 10, 1989Date of Patent: April 16, 1991Assignee: Bayer AktiengesellschaftInventors: Gerhard Heywang, Friedrich Jonas
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Patent number: 5004841Abstract: Aromatic compounds, such as benzene or biphenyl, are alkylated with an alkylating agent having from one to eight carbons atoms, such as propylene, in the presence of an acidic mordenite zeolite catalyst under conditions sufficient to produce a mixture of substituted aromatic compounds enriched in the linear alkylated isomers, such as p-diisopropylbenzene or p,p'-di(isopropyl)biphenyl, respectively. The novel acidic mordenite catalyst is characterized by its silica/alumina molar ratio, its porosity, and a Symmetry Index. The p,p'-disubstituted isomers of aromatic compounds are useful as monomers in the preparation of thermotropic, liquid crystal polymers.Type: GrantFiled: March 14, 1989Date of Patent: April 2, 1991Assignee: The Dow Chemical CompanyInventors: Guo-shuh J. Lee, Juan M. Garces, Joseph J. Maj, Stephen C. Rocke
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Patent number: 4985582Abstract: Bicyclo-[2,2,1]-heptanes, bicyclo-[2,2,2]-octanes and bicyclo-[2,2,3]-nonanes, having 2 or 3 ring hetero atoms selected from O, S and N substituted at the 1-position by a carbocyclic group other than an alkynylphenyl group, and substituted at the 4-position and optionally substituted at the 3 and/or 5 position, are valuable pesticides, particularly insecticides and acaricides. Various cyclization processes are disclosed to form the various bicyclo ring systems.Type: GrantFiled: September 1, 1989Date of Patent: January 15, 1991Assignee: The Wellcome Foundation Ltd.Inventor: John P. Larkin
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Patent number: 4977236Abstract: A process for preparation of a copoly(arylene sulfide) corresponding to the structure ##STR1## wherein A is a divalent substituted or unsubstituted aromatic radical, T is a monovalent aromatic radical, x is in the range of 0.5 to 0.001 and n is an integer from 1 to 100.Type: GrantFiled: December 5, 1989Date of Patent: December 11, 1990Assignee: Eastman Kodak CompanyInventors: David R. Fagerburg, Joseph J. Watkins, Paul B. Lawrence, Mark Rule
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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
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Patent number: 4943662Abstract: The invention relates to the synthesis of dithiols and more particularly that of .alpha.,.omega.-dithiols having 5 to 20 carbon atoms.The process according to the invention comprises reacting a di-(tertiary-alkylthio)alkane with hydrogen sulphide in the presence of a solid acid catalyst. The alkane dithiol is obtained selectively and a tertiary-alkyl mercaptan is obtained as by-product. It is possible to reuse the latter in a cyclical process to produce the original di-(tertiary-alkylthio)alkane.Type: GrantFiled: December 22, 1988Date of Patent: July 24, 1990Assignee: Societe Nationale Elf Aquitaine (Production)Inventor: Emmanuel Arretz
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Patent number: 4915858Abstract: This invention describes compositions containing nitrogen, sulfur and optionally oxygen which are useful as antioxidants for lubricants.Type: GrantFiled: June 23, 1988Date of Patent: April 10, 1990Assignee: The Lubrizol CorporationInventor: Mary F. Salomon
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Patent number: 4894174Abstract: The present invention deals with compositions containing sulfur and oxygen which are useful in lubricants and automatic transmission fluids.Type: GrantFiled: June 24, 1988Date of Patent: January 16, 1990Assignee: The Lubrizol CorporationInventor: Mary F. Salomon
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Patent number: 4891448Abstract: Polycyclic aromatic compounds, such as biphenyl, are alkylated with an alkylating agent, such as propylene, in the presence of an acidic mordenite zeolite catalyst under conditions sufficient to produce a mixture of substituted polycyclic aromatic compounds enriched in the para alkylated isomers, such as p,p'-di(isopropyl)biphenyl. The novel acidic mordenite catalyst is characterized by its silica/alumina molar ratio, its porosity, and a Symmetry Index. The p,p'-disubstituted isomers of polycyclic aromatic compounds are useful as monomers in the preparation of thermotropic, liquid crystal polymers.Type: GrantFiled: November 23, 1987Date of Patent: January 2, 1990Assignee: The Dow Chemical CompanyInventors: Juan Garces, Joseph J. Maj, G. John Lee, Stephen C. Rocke
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Patent number: 4798684Abstract: This invention describes compositions containing nitrogen, sulfur and optionally oxygen which are useful as antioxidants for lubricants.Type: GrantFiled: June 9, 1987Date of Patent: January 17, 1989Assignee: The Lubrizol CorporationInventor: Mary F. Salomon
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Patent number: 4792634Abstract: A method for preparing aryl sulfides by heating an iodoaromatic compound with elemental sulfur at a temperature above about 150.degree. C.Type: GrantFiled: August 20, 1987Date of Patent: December 20, 1988Assignee: Eastman Kodak CompanyInventor: Mark Rule
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Patent number: 4783285Abstract: The nucleophilic substitution upon unactivated monocyclic or polycyclic aromatic or heteroaromatic substrates bearing suitable leaving groups can be achieved by catalyzing the substitution of said leaving groups by an anionic nucleophile with a cyclic or acyclic polydentate chelating ligand. Specific products of this reaction can be used in preparing sulfonylurea herbicides.Type: GrantFiled: February 3, 1987Date of Patent: November 8, 1988Assignee: E. I. DuPont de Nemours and CompanyInventor: Alden D. Josey
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Patent number: 4764299Abstract: The present invention deals with compositions containing sulfur and oxygen which are useful in lubricants and automatic transmission fluids.Type: GrantFiled: June 9, 1987Date of Patent: August 16, 1988Assignee: The Lubrizol CorporationInventor: Mary F. Salomon
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Patent number: 4760013Abstract: Alkyldiarylsulfonium salts of 9, 10,-dithiophenoxyanthracene are useful as photoinitiators in resist compositions, such as epoxy resin formulations, particularly using long wavelength light.Type: GrantFiled: February 17, 1987Date of Patent: July 26, 1988Assignee: International Business Machines CorporationInventors: Nigel P. Hacker, Carl E. Larson
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Patent number: 4745227Abstract: New compounds having the generic formula: ##STR1## wherein: X=halogen, Y= ##STR2## X=Y= ##STR3## X=Y= ##STR4## R=hydrogen, halogen such as chlorine, lower alkoxy such as methoxy, or lower alkyl such as methyl.These new compounds are useful as reversible photochromatic solids.Type: GrantFiled: March 29, 1985Date of Patent: May 17, 1988Assignee: The Regents of the University of CaliforniaInventors: Fred Wudl, Sherman D. Cox
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Patent number: 4734522Abstract: Six-membered ring compounds of the formula I ##STR1## wherein A is a benzene or cyclohexane ring,X.sup.1 to X.sup.6 independently of one another in each case are H, --OR, --COOR, --SR, --SOR, --SO.sub.2 R or, if A is a cyclohexane ring, also --O--COR, andR is in each case an alkyl group which has up to 15 C atoms and in which one or two CH.sub.2 groups can be replaced by O atoms, at least three of the substituents X.sup.1 to X.sup.6 being other than H,can be used as constituents of discotic liquid-crystal phases for liquid-crystal display elements.Type: GrantFiled: January 7, 1986Date of Patent: March 29, 1988Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Klaus Praefcke, Bernd Kohne, Wadi Poules, Rudolf Eidenschink, Bernhard Scheuble
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Patent number: 4731450Abstract: A process for the perfluoroalkylation of aromatic derivatives. In a first stage, an aromatic derivative, sulfur dioxide and a metal selected from the group consisting of zinc, aluminum, manganese, cadmium, magnesium, tin, iron, nickel and cobalt, are brought into contact in a solvent, preferably a polar aprotic solvent. In a second stage, a perfluoroalkyl bromide or iodide is added to react with the aromatic derivative.Type: GrantFiled: May 21, 1986Date of Patent: March 15, 1988Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Claude Wakselman, Marc Tordeux
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Patent number: 4727191Abstract: A (hydrocarbylthio)aromatic amine, such as a methylthiosubstituted toluenediamine, is separated from corresponding aromatic amines containing fewer hydrocarbylthio groups by washing an organic solution of the amine mixture with a dilute aqueous acid having a pKa value below 7 to extract at least a portion of the corresponding aromatic amines.Type: GrantFiled: July 10, 1986Date of Patent: February 23, 1988Assignee: Ethyl CorporationInventor: Christopher J. Nalepa
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Patent number: 4695473Abstract: Described are gem dithioethers of phenylalkanes defined according to the structure: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each the same or different and each represents hydrogen or C.sub.1 -C.sub.3 lower alkyl; X represents 1,1-ethylidene, 1,1-propylidene or 2,2-propylidene and N represents 0 or 1 with the provisos(i) when N is 0, R.sub.5 is C.sub.1 -C.sub.3 lower alkyl; and(ii) when N=1, R.sub.5 is hydrogenand uses thereof in augmenting or enhancing the aroma or taste of foodstuffs.Type: GrantFiled: December 26, 1985Date of Patent: September 22, 1987Assignee: International Flavors & Fragrances Inc.Inventors: Alan O. Pittet, Ranya Muralidhara, Domenick Luccarelli, Jr., Kevin P. Miller, Manfred H. Vock
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Patent number: 4694106Abstract: Described are methylthioionene derivatives defined according to the structure: ##STR1## wherein n is 0 or 1; wherein the dashed lines each represent a carbon-carbon single bond or a carbon-carbon double bond with the proviso that when the dashed line at the 3'-4' position is a double bond, n represents 0 and uses thereof in augmenting or enhancing the aroma or taste of foodstuffs.Type: GrantFiled: March 7, 1986Date of Patent: September 15, 1987Assignee: International Flavors & Fragrances Inc.Inventors: Alan O. Pittet, Ranya Muralidhara, Manfred H. Vock, Kevin P. Miller, Domenick Luccarelli, Jr.
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Patent number: 4683091Abstract: The nucleophilic substitution upon unactivated monocyclic or polycyclic aromatic or heteroaromatic substrates bearing suitable leaving groups can be achieved by catalyzing the substitution of said leaving groups by an anionic nucleophile with a cyclic or acyclic polydentate chelating ligand. Specific products of this reaction can be used in preparing sulfonylurea herbicides.Type: GrantFiled: September 9, 1985Date of Patent: July 28, 1987Assignee: E. I. Du Pont de Nemours and CompanyInventor: Alden D. Josey
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Patent number: 4658067Abstract: Described are dialkylthioalkenes, dialkylthioalkylcycloalkenes and monoalkylthioalkenylcycloalkenes defined according to the generic structure: ##STR1## as well as the genus defined according to the structure: ##STR2## wherein R represents C.sub.6 -C.sub.11 alkenyl or cycloalkenylalkyl; and wherein R.sub.2 represents C.sub.1 -C.sub.3 alkyl and R.sub.3 is C.sub.1 -C.sub.3 alkyl and organoleptic uses thereof in augmenting or enhancing the aroma or taste of foodstuffs, chewing gums, toothpastes or medicinal products.Type: GrantFiled: November 21, 1985Date of Patent: April 14, 1987Assignee: International Flavors & Fragrances Inc.Inventors: Alan O. Pittet, Ranya Muralidhara, Kevin P. Miller, Domenick Luccarelli, Jr., Manfred H. Vock
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Patent number: 4631143Abstract: Triphenylene derivatives of the formula I ##STR1## wherein X.sup.1 to X.sup.6 are each, independently of one another, --SH, --SR, --SOR, --SO.sub.2 R or --S--COR, and each R is an alkyl group with up to 20 C atoms, it being possible for one or two CH.sub.2 groups to be replaced by O atoms and/or by unsubstituted or substituted vinylene or vinylidene groups, may be used as components of discotic liquid-crystalline phases.Type: GrantFiled: December 21, 1984Date of Patent: December 23, 1986Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Klaus Praefcke, Bernd Kohne, Wadi Poules, Eike Poetsch
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Patent number: 4626599Abstract: Described are dithioethers of 2-phenyl-2-alkenals defined according to the generic structure: ##STR1## wherein N represents 0 or 1 and R.sub.4 and R.sub.5 each represents hydrogen or methyl taken alone or taken further together with dithioethers of 2-phenyl-2-alkenals defined according to the structure: ##STR2## wherein N and R.sub.4 and R.sub.5 are defined, supra and uses thereof in augmenting or enhancing the aroma or taste of foodstuffs, chewing gums, toothpastes and medicinal products.Type: GrantFiled: October 25, 1985Date of Patent: December 2, 1986Assignee: International Flavors & Fragrances Inc.Inventors: Alan O. Pittet, Ranya Muralidhara, Kevin P. Miller, Domenick Luccarelli, Jr.
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Patent number: 4621098Abstract: The present invention provides thioethers of the general formula: ##STR1## wherein Ar is a phenyl radical which is optionally substituted one, two or three times by alkyl, alkenyl, alkoxy, alkylthio, alkanoyl, hydroxyl, hydroxyalkyl, carboxyl, alkoxycarbonyl, carbamoyl, nitro, amino or halogen, Q is an oxygen or sulphur atom or an NH group, A is a straight-chained or branched C.sub.2 -C.sub.8 alkylene radical which is optionally substituted by a hydroxyl group or can be interrupted by an ethenylene or ethynylene group, n is 0, 1 or 2, and R is a hydrogen atom or a straight-chained or branched alkyl radical which is optionally substituted one or more times by the same or different radicals selected from alkoxycarbonyl, alkoxy, hydroxyl, carboxyl or optionally substituted carbamoyl or amino; as well as the pharmacologically acceptable salts thereof, with the proviso that A cannot be ethylene when Ar is a phenyl radical, Q is an oxygen atom and R is the group --CH.sub.2 COOH.Type: GrantFiled: July 2, 1984Date of Patent: November 4, 1986Assignee: Boehringer Mannheim GmbHInventors: Robert Umminger, Walter-Gunar Friebe, Wolfgang Kampe, Androniki Roesch, Otto-Henning Wilhelms