Process Of Forming The Unsaturated Hydrocarbyl Side Chain Patents (Class 546/352)
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Patent number: 8933237Abstract: Methods for synthesizing deuterated vinylpyridine compounds of the Formula (1), wherein the method includes: (i) deuterating an acyl pyridine of the Formula (2) in the presence of a metal catalyst and D2O, wherein the metal catalyst is active for hydrogen exchange in water, to produce a deuterated acyl compound of Formula (3); (ii) reducing the compound of Formula (3) with a deuterated reducing agent to convert the acyl group to an alcohol group, and (iii) dehydrating the compound produced in step (ii) with a dehydrating agent to afford the vinylpyridine compound of Formula (1). The resulting deuterated vinylpyridine compounds are also described.Type: GrantFiled: January 16, 2014Date of Patent: January 13, 2015Assignee: UT-Battelle, LLCInventors: Kunlun Hong, Jun Yang, Peter V. Bonnesen
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Publication number: 20140213793Abstract: Methods for synthesizing deuterated vinylpyridine compounds of the Formula (1), wherein the method includes: (i) deuterating an acyl pyridine of the Formula (2) in the presence of a metal catalyst and D2O, wherein the metal catalyst is active for hydrogen exchange in water, to produce a deuterated acyl compound of Formula (3); (ii) reducing the compound of Formula (3) with a deuterated reducing agent to convert the acyl group to an alcohol group, and (iii) dehydrating the compound produced in step (ii) with a dehydrating agent to afford the vinylpyridine compound of Formula (1). The resulting deuterated vinylpyridine compounds are also described.Type: ApplicationFiled: January 16, 2014Publication date: July 31, 2014Applicant: UT-Battelle, LLCInventors: Kunlun Hong, Jun Yang, Peter V. Bonnesen
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Publication number: 20140024836Abstract: Methods for synthesizing deuterated vinylpyridine compounds of the Formula (1), wherein the method includes: (i) deuterating an acyl pyridine of the Formula (2) in the presence of a metal catalyst and D2O, wherein the metal catalyst is active for hydrogen exchange in water, to produce a deuterated acyl compound of Formula (3); (ii) reducing the compound of Formula (3) with a deuterated reducing agent to convert the acyl group to an alcohol group, and (iii) dehydrating the compound produced in step (ii) with a dehydrating agent to afford the vinylpyridine compound of Formula (1). The resulting deuterated vinylpyridine compounds are also described.Type: ApplicationFiled: July 19, 2012Publication date: January 23, 2014Applicant: UT-BATTELLE, LLCInventors: Kunlun Hong, Jun Yang, Peter V. Bonnesen
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Publication number: 20130281700Abstract: The invention relates to palladium(0)-tris{tri-[3,5-bis(trifluoromethyl)-phenyl]-phosphine} complex of formula (I), as well as to its preparation and use. This compound is outstandingly stable, and can be used as catalyst with excellent results.Type: ApplicationFiled: June 14, 2013Publication date: October 24, 2013Applicants: CHINOIN GYOGYSZER-ES VEGYESZETI TER-MEKEK GYARA ZRT, H4SEP KFTInventors: Zoltán DALICZEK, Tibor SOÓS, Zoltán FINTA, Géza Timári, Gábor Vlád
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Patent number: 8420812Abstract: A process for the palladium-catalyzed coupling of terminal alkynes with heteroaryl tosylates and heteroaryl benzenesulfonates The present invention relates to a process for the regioselective synthesis of compounds of the formula (I), wherein D, J and W have the meanings indicated in the claims. The present invention provides an efficient and general palladium-catalyzed coupling process of heteroaryl tosylates with terminal alkynes to a wide variety of substituted, multifunctional heteroaryl-1-alkynes of the formula I.Type: GrantFiled: December 23, 2009Date of Patent: April 16, 2013Assignee: SanofiInventors: Omar Rkyek, Marc Nazare, Andreas Lindenschmidt, Jorge Alonso, Matthias Urmann, Nis Halland
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Publication number: 20120245348Abstract: Disclosed herein are phosphine compounds represented by the general formula (4): and corresponding phosphonium salts represented by the general formula (4a): Also disclosed are processes for the preparation of these phosphines and phosphonium salts as well as their use as ligands in catalytic reactions.Type: ApplicationFiled: April 2, 2012Publication date: September 27, 2012Inventors: Herbert PLENIO, Christoph FLECKENSTEIN, Renat KADYROV, Juan ALMENA, Axel MONSEES, Thomas RIERMEIER
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Publication number: 20110172432Abstract: The invention relates to the field of chemistry, especially organic chemistry, and more specifically the field of heterogeneous palladium catalysts used to catalyse chemical reactions involving the formation of carbon-carbon bonds. The invention also relates to a method for synthesising a heterogeneous palladium catalyst that can catalyse a C—C coupling reaction, the method essentially including steps of providing a solid substrate onto which groups of formula —PR1R2, wherein R1 is an optionally substituted alkyl group, or an optionally substituted cycloalkyl group, et R2 is an optionally substituted aryl group or an optionally substituted heteroaryl group, have been covalently bonded, and incorporating a catalytically effective amount of palladium into the resulting substituted substrate. The invention further relates to the resulting catalysts and to the uses thereof in C—C coupling reactions.Type: ApplicationFiled: April 11, 2008Publication date: July 14, 2011Applicants: UNIVERSITE DE HAUTE ALSACE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Claude Le Drian, Jean-Michel Becht, Stéphane Schweizer
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Patent number: 7105707Abstract: Mono- and disubstituted aryl or heterocyclic acetylenes are produced by a process comprising reacting an aryl nitrile with an alkynylzinc compound, a bis-alkynylzinc compound, or an alkynylmagnesium compound, in the presence of a nickel/phosphine catalyst.Type: GrantFiled: December 17, 2003Date of Patent: September 12, 2006Assignee: PharmaCore, Inc.Inventors: Joseph A. Miller, Jonathan M. Penney
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Patent number: 6897320Abstract: The present invention relates to a process for the preparation of 2,6-divinylpyridine and 2-methyl-6-vinylpyridine over modified zeolite catalysts. In particular, it relates to the method for the synthesis of 2,6-divinylpyridine and 2-methyl-6-vinylpyridine from 2,6-lutidine and formaldehyde in vapour phase in an eco-friendly method with high yield and selectivity. This invention provides a non-corrosive, eco-friendly process, where the catalyst can be reused for many times. 2,6-Divinylpyridine is useful stating material in polymer industry.Type: GrantFiled: March 25, 2003Date of Patent: May 24, 2005Assignee: Council of Scientific and Industrial ResearchInventors: Shivanand Janardan Kulkarni, Madhavi Gangapuram, Vijaya Raghavan Kondapuram
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Publication number: 20040192925Abstract: The present invention relates to a process for the preparation of 2,6-divinylpyridine and 2-methyl-6-vinylpyridine over modified zeolite catalysts. In particular, it relates to the method for the synthesis of 2,6-divinylpyridine and 2-methyl-6-vinylpyridine from 2,6-lutidine and formaldehyde in vapour phase in an eco-friendly method with high yield and selectivity. This invention provides a non-corrosive, eco-friendly process, where the catalyst can be reused for many times.Type: ApplicationFiled: March 25, 2003Publication date: September 30, 2004Inventors: Shivanand Janardan Kulkarni, Madhavi Gangapuram, Vijaya Raghavan Kondapuram
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Patent number: 6753447Abstract: This invention discloses a process for synthesizing an amine functionalized monomer that comprises (1) reacting a secondary amine with a 2,3-dihalopropene to produce a vinyl halide containing secondary amine having a structural formula selected from the group consisting of wherein R and R′ can be the same or different and represent allyl, alkoxyl or alkyl groups containing from 1 to about 10 carbon atoms, and wherein X represents a halogen atom, and wherein m represents an integer from 4 to about 10, and wherein X represents a halogen atom; and (2) reacting the vinyl halide containing secondary amine with a vinyl magnesium halide to produce the monomer having a structural formula wherein R and R′ can be the same or different and represent alkyl, allyl or alkoxyl groups containing from 1 to about 10 carbon atoms, and wherein m represents an integer from about 4 to about 10.Type: GrantFiled: February 20, 2003Date of Patent: June 22, 2004Assignee: The Goodyear Tire & Rubber CompanyInventors: Adel Farhan Halasa, Wen-Liang Hsu, Naoya Ogata
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Patent number: 6727365Abstract: The present invention relates to an improved eco-friendly process for the preparation of vinylpyridine from corresponding picoline over modified zeolite catalyst in vapour phase which comprises reacting picoline with formaldehyde with a molar ratio of formaldehyde to picoline in the range of 1:1 to 4:1, at a temperature ranging between 200° C. to 450° C., at a weight hourly in the range of 0.25 hr−1-1.00 hr−1 over a modified commercial zeotlite catalyst to obtain a high yield and selectivity of the desired product.Type: GrantFiled: October 31, 2002Date of Patent: April 27, 2004Inventors: Shivanand Janardan Kulkarni, Gangapuram Madhavi, Venkataraman Viswanathan, Kondapuram Vi jaya Raghavan
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Patent number: 6603013Abstract: The present invention relates to a process wherein heterogeneous finely-dispersed palladium catalysts are used in a cross-coupling reaction of alkenyl halides and aryl or heteroaryl boronic acids in the presence of base in an aprotic solvent to produce aryl- or heteroaryl-olefin compounds of Formula I:Type: GrantFiled: July 16, 2001Date of Patent: August 5, 2003Assignee: Merck & Co., Inc.Inventors: Yongkui Sun, Carl LeBlond, John R. Sowa, Jr.
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Patent number: 6576803Abstract: The present invention provides a catalyst for the oxidative dehydrogenation of a lower hydrocarbon to form at least one higher hydrocarbon and/or lower olefin. In one embodiment, the catalyst includes a nonstoichiometric rare earth oxycarbonate of the formula MXCYOZ having a disordered and/or defect structure, wherein M is at least one rare earth element selected from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Tm; X=2; Z=3+AY; A is less than about 1.8, and Y is the number of carbon atoms in the oxycarbonate. When used for the oxidative dehydrogenation of a lower hydrocarbon at a pressure above about 100 psig, the catalyst has a selectivity of at least about 40% to at least one higher hydrocarbon and/or lower olefin. Methods for preparing catalysts taught by the invention and processes for using the catalysts for the oxidative dehydrogenation of lower hydrocarbons are also provided.Type: GrantFiled: April 16, 2002Date of Patent: June 10, 2003Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Rick David Cantrell, Anca Ghenciu, Kenneth Dwight Campbell, David Michael Anthony Minahan, Madan Mohan Bhasin, Alistair Duncan Westwood, Kenneth Andrew Nielsen
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Publication number: 20030008889Abstract: The present invention provides novel aminoadamantane derivatives, methods of making the derivatives, compositions including the novel aminoadamantane derivatives, and methods for the treatment and prevention of neurological diseases using the derivatives and compositions.Type: ApplicationFiled: July 19, 2002Publication date: January 9, 2003Inventors: Yuqiang Wang, Wenqing Ye, James W. Larrick, Jonathan S. Stamler, Stuart A. Lipton
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Patent number: 6492524Abstract: The present invention provides an improved process for the synthesis of aryl pyridine bases by reacting an aromatic aldehyde or ketone and allylic alcohol or aldehyde in presence of ammonia in gas phase, in high yield and selectivity with catalyst obtained by optionally modifying a zeolite having an atomic ratio of Si to Al, 2.5 to 12.5 and /or with at least one metal ion and/or metal compound selected from the group consisting of lead and lanthanum. This process provides an eco-friendly, more economical and highly selective heterogeneous method.Type: GrantFiled: March 27, 2001Date of Patent: December 10, 2002Assignee: Council of Scientific and Industrial ResearchInventors: Shivanand Janardan Kulkarni, Kondapuram Vijaya Raghavan, Srinivas Nagabandi, Radha Rani Vippagunta
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Publication number: 20020123633Abstract: Described are preferred processes for preparing alkenyl-substituted nitrogenous heterocycles such as vinylpyridines, which comprise reacting a corresponding methyl-substituted heterocycle with a C1 compound such as formadehyde in the vapor phase over a zeolite catalyst having acidic and basic catalytic sites. The preferred zeolite is a medium-pore zeolite, for example having a constraint index of about 0.5 to about 12. Processes of the invention can be conducted as facile, one-step syntheses utilizing relatively low ratios of alkyl-substituted starting heterocycle (e.g. &agr;-picoline or &ggr;-picoline) to formaldehyde while nonetheless achieving high selectivities and yields of the corresponding alkenyl compound.Type: ApplicationFiled: October 22, 2001Publication date: September 5, 2002Inventors: Colin H. McAteer, Aaron J. Edwards, Yarlagadda V. Subba Rao
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Patent number: 6372693Abstract: The invention relates to 2-(3-alkenylbenzoyl)cyclohexane-1,3-diones of the formula I where the variables have the following meanings: R1, R2 are hydrogen, nitro, halogen, cyano, thiocyanato, alkyl, haloalkyl, alkoxyalkyl, alkenyl, alkynyl, —OR6, —OCOR7, —OSO2R7, —SH, —S(O)nR8, —SO2OR6, —SO2NR6R9, —NR9SO2R7 or —NR9COR7; R3 is hydrogen, halogen, alkyl, haloalkyl, alkoxy, alkenyl, alkynyl; R4, R5 are hydrogen, nitro, halogen, cyano, thiocyanato, alkyl, haloalkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, alkoxy, alkylthio, haloalkoxy, —COR10, —CO2R10, —COSR10, —CONR10R11, —C(R12)═NR13, —PO(OR10)(OR11); unsubstituted or substituted alkyl, heterocyclyl, heterocyclylalkyl, phenyl, phenylalkyl, hetaryl or hetarylalkyl; or R4 and R5 together form an alkanediyl chain which can be substituted and/or can be interrupted by a hetero atom; Q is an unsubstituted or substituted cyclohexane-1,3-dione ring whType: GrantFiled: November 2, 1999Date of Patent: April 16, 2002Assignee: BASF AktiengesellschaftInventors: Ernst Baumann, Wolfgang von Deyn, Stefan Engel, Regina Luise Hill, Uwe Kardorff, Guido Mayer, Martina Otten, Michael Rack, Joachim Rheinheimer, Matthias Witschel, Karl-Otto Westphalen, Ulf Misslitz, Helmut Walter
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Patent number: 6197966Abstract: A method for producing an optically active amino alcohol compound of the formula [3], an enantiomer thereof or a salt thereof, comprising reacting a mesoepoxide compound of the formula [1] with a compound of the formula [2] in the presence of a mixed catalyst comprising a Lewis acid and a proton donor: wherein R1, R2 and R3 are each H, an optionally substituted lower alky, and the like, or R1 and R1 or R2 and R3 may form an optionally substituted ring; and R4 and R5 are each H, an optionally substituted lower alkyl, and the like, or R4 and R5 may form an optionally substituted ring together with the adjacent N, or an imide group or azide group together with the adjacent N, and R6 is H or a silyl group. The present invention enables stereoselective production of a desired intermediate compound, which is an HIV protease inhibitor, extremely efficiently as compared to conventional methods.Type: GrantFiled: January 15, 1999Date of Patent: March 6, 2001Assignees: Japan Tobacco Inc., Agouron Pharmaceuticals, Inc.Inventors: Takashi Inaba, Shoichi Sagawa, Hiroyuki Abe
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Patent number: 6008364Abstract: There is provided a process for producing an alkenyl-substituted pyridine derivative using, a solid base catalyst which is obtained by heating a metal oxide selected from the group consisting of alumina, an alkaline earth metal oxide and a hydrotalcite withan alkali metal,an alkali compound and an alkali metal oran alkali compound and an alkali metal hydride under an inert gas atmosphere at a temperature within the range of 100-700.degree. C.Type: GrantFiled: July 10, 1998Date of Patent: December 28, 1999Assignee: Sumitomo Chemical Company, LimitedInventors: Michio Yamamoto, Gohfu Suzukamo
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Patent number: 5861230Abstract: There is described a novel process of polymerizing 4-vinyl pyridine monomer in an aqueous polymerization system which comprises preparing an aqueous solution of polyvinyl alcohol, and contacting said aqueous solution of a polyvinyl alcohol with less than about 10% by weight of 4-vinyl pyridine monomer and a water-soluble initiator capable of decomposing to give free radicals.The resultant dispersion of the novel polymerization process comprises a homogeneous, i.e., weight average molecular weight and particle size, poly-4-vinylpyridine, with no appreciable residual 4-vinyl pyridine monomer.The resultant dispersion may be used to coat image- and ink-receiving layers of image-recording materials and ink jet recording sheets, respectively.Type: GrantFiled: April 21, 1997Date of Patent: January 19, 1999Assignee: Polaroid CorporationInventors: Shawn P. Lambert, Xiaojia Z. Wang
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Patent number: 5360911Abstract: A novel process is disclosed for producing stilbazolium salts. Said novel process employs a heterocyclic amine catalyst, such as pyrrolidine, an alkylated pyridine salt and a substituted benzaldehyde which unexpectedly results in increased reaction rates and product yields.Type: GrantFiled: June 17, 1993Date of Patent: November 1, 1994Assignee: General Electric CompanyInventors: Eugene P. Boden, Peter D. Phelps, Kevin R. Stewart
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Patent number: 5243099Abstract: Organic polymer additive containing polar functional groups enhances the stability of palladium-containing catalysts for the telomerization of conjugated diolefins in the presence of active hydrogen-containing telomerization agent to produce alpha-substituted alkadienes.Type: GrantFiled: September 9, 1992Date of Patent: September 7, 1993Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventor: Diane L. Packett
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Patent number: 5169981Abstract: Organic polymer additive containing polar functional groups enhances the stability of palladium-containing catalysts for the telomerization of conjugated diolefins in the presence of active hydrogen-containing telomerization agent to produce alpha-substituted alkadienes.Type: GrantFiled: December 6, 1991Date of Patent: December 8, 1992Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventor: Diane L. Packett
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Patent number: 5001294Abstract: Aromatic alkenes, especially diarylbutadienes are produced in a simple economic process by reaction of an anil with an organic compound having a non-aromatic unsaturated system conjugated with an aromatic system, and a terminal methyl group pendent from the non-aromatic unsaturated system; in particular the organic compound is a propenyl-substituted aromatic compound.Type: GrantFiled: October 31, 1988Date of Patent: March 19, 1991Inventor: Allan S. Hay
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Patent number: 4876349Abstract: The compounds of the formula ##STR1## wherein X and Y are independently --CH.sub.2 -- or >C(CH.sub.3).sub.2 ; Z is --CHR.sup.8 --, >Co, >CR.sup.8 OR.sup.7 , --CHR.sup.8 --CHR.sup.8 --, --CHOR.sup.7 --CH.sub.2 --, --CO--CHOR.sup.7 or --CHOR.sup.7 --CHOR.sup.7 --R.sup.1 is a 5- or 6-membered, monocyclic heterocyclic group which optionally can be C-substituted by halogen, lower-alkyl, lower-alkoxy, acyloxy, nitro, hydroxy, amino, lower-alkylamino or di-lower-alkylamino and/or which can be substituted on a ring --NH-- group by lower-alkyl; R.sup.2 and R.sup.3 are independently hydrogen, lower-alkyl, trifluoromethyl or halogen and one of R.sup.2 and R.sup.3 always is trifluoromethyl or lower-alkyl; R.sup.4 and R.sup.5 are independently hydrogen, alkyl, alkoxy or halogen; R.sup.6 is hydrogen, lower-alkyl or --OR.sup.7 ; R.sup.7 is hydrogen, lower-alkyl or acyl; R.sup.8 is hydrogen or lower-alkyl; and R.sup.7 and R.sup.8 can be the same or different from one another.Type: GrantFiled: July 10, 1987Date of Patent: October 24, 1989Assignee: Hoffmann-La Roche Inc.Inventors: Michael Klaus, Ekkehard Weiss
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Patent number: 4755600Abstract: Thermosettable prepolymers or resins are prepared by reacting (1) a pyrazine compound containing at least two substituent groups which have a hydrogen atom attached to a carbon atom which is attached to the ring such as tetramethylpyrazine, (2) a material containing at least two aromatic aldehyde groups, and (3) at least one of (a) a nitrogen containing aromatic heterocyclic compound containing at least one hydrogen atom attached to a carbon atom attached to the ring and a polymerizable unsaturated group such as 2-methyl-5-vinylpyridine or (b) an aldehyde containing at least one polymerizable unsaturated group such as 4-isopropenyl-1-cyclohexene-1-carboxaldehyde. These prepolymers or resins are curable to thermoset products having good mechanical and thermal properties by heat and pressure or by homopolymerization or copolymerization with N,N'-bis-imides such as 1,1'-(methylenedi-4,1-phenylene)bismaleimide. The prepolymers are suitable for preparing composites.Type: GrantFiled: March 17, 1986Date of Patent: July 5, 1988Assignee: The Dow Chemical CompanyInventor: Duane S. Treybig
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Patent number: 4703124Abstract: A process for introduction of styrenes in the side chain of substituted aromatic compounds, said side chain containing at least one hydrogen atom in the .alpha.-position thereof, is disclosed, comprising reacting the styrenes and the substituted aromatic compounds in the presence of (A) an alkali metal and (B) a compound containing a benzyloxy group or alkyl and/or aryl-substituted benzyloxy group. Use of (A) and (B) as a reaction accelerator permits to introduce the styrenes in the side chain of the substituted aromatic compounds in high yield and selectivity.Type: GrantFiled: December 19, 1985Date of Patent: October 27, 1987Assignee: Idemitsu Kosan Company LimitedInventors: Toshiyuki Tsubouchi, Tomiyasu Minokami, Nobuaki Shimizu
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Patent number: 4620055Abstract: The present invention provides a novel process for the preparation of styrene, stilbene, and/or substituted derivatives thereof. The process involves the reaction of an aryl sulfonyl chloride with an olefinic compound in the presence of a catalytic amount of a metal catalyst consisting essentially of palladium.Type: GrantFiled: October 7, 1985Date of Patent: October 28, 1986Assignee: Eastman Kodak CompanyInventors: Carl M. Lentz, James R. Overton, David D. Cornell
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Patent number: 4477673Abstract: The invention relates to compounds of the formula I ##STR1## wherein R' is bound in the 4- or 5-position, R and R' are --CH.sub.2 OH, --CH.sub.2 CH.sub.2 OH, --CH.sub.2 CH.sub.2 OCH.sub.2 C.sub.6 H.sub.5, --CH.sub.2 --X, --CH.sub.2 P.sup..sym. (Y).sub.3 X.sup..crclbar., --CH.sub.2 P(O)(C.sub.1-3 alkoxy).sub.2 or --CH.dbd.CH.sub.2, R" is C.sub.1-10 alkyl, X is a halogen atom, X.sup..crclbar. is the anion corresponding to X and Y is phenyl or phenyl which is substituted by a C.sub.1 -C.sub.5 alkyl group. These compounds can be obtained by a novel simple process in good to very good yield by co-cyclotrimerizing nitriles R"--CN with alkynes HC.dbd.C--Z (Z is --CH.sub.2 OH, --CH.sub.2 CH.sub.2 OH or --CH.sub.2 CH.sub.2 OCH.sub.2 C.sub.6 H.sub.5), in the presence of a cobalt(I) catalyst, dehydrating the resultant pyridines either to compounds of the formula I, in which R and R" are --CH.dbd.CH.sub.Type: GrantFiled: January 17, 1983Date of Patent: October 16, 1984Assignee: Ciba-Geigy CorporationInventor: Jurgen Kaschig
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Patent number: 4374051Abstract: Certain pyridine derivatives have been found to possess particularly useful odorous properties. They develop green and herbaceous fragrance notes and have a specific utility for the reconstitution of the essential oil of Artemesia Vulgaris.Type: GrantFiled: January 26, 1981Date of Patent: February 15, 1983Assignee: Firmenich SAInventors: Regula Naf, Wilhelm Pickenhagen, Anthony F. Morris
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Patent number: 4266061Abstract: A process is described for the catalytic, selective preparation of 2-vinylpyridine from acetylene and acrylonitrile using a cyclopentadienylcobalt catalyst or .pi.-allylcobalt catalyst at elevated temperature in an inert solvent, wherein the acrylonitrile concentration is up to 2 mols/liter and the reaction is carried out at a temperature over 140.degree. C. and up to 180.degree. C., the reaction time being not more than 50 minutes.Type: GrantFiled: September 14, 1979Date of Patent: May 5, 1981Assignee: Studiengesellschaft Kohle mbHInventors: Helmut Bonnemann, Marc Samson
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Patent number: 4246421Abstract: This invention relates to an improved process for the dehydrogenation of alkyl-substituted aromatic compounds to the corresponding alkenyl-substituted aromatics in the presence of oxygen and in the presence of an improved metal phosphate catalyst composition.Type: GrantFiled: September 15, 1978Date of Patent: January 20, 1981Assignee: The Standard Oil CompanyInventors: Joseph P. Bartek, Robert K. Grasselli