The Compound Consists Of The Ring Sulfur, Carbon, And Hydrogen Patents (Class 549/83)
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Patent number: 6333082Abstract: Liquid crystalline compounds useful in super twisted nematic liquid crystal displays are described and have the formula: wherein n is 1-5; m is 0-5; p is 0, 1 or 2; q is 0, 1 or 2 p+q is less than or equal to 3; A1, A2, A3 are independently chosen from 1,4-disubstituted benzene, 2,5-disubstituted pyrimidine, 1,5-disubstituted pyridine, 2,6-disubstituted naphthalene which may be laterally substituted with F, Cl, Br or CN, trans-1,4-disubstituted cyclohexane, 2,5-disubstituted dioxane, 2,5-disubstituted thiophene, 2,5-disubstituted furan, 2,5-disubstituted thiodiazole Z1 may be COO, OOC, OCH2, O; Z2, Z3 are independently chosen from a direct bond, COO, OOC, C2H4, CH2O, OCH2, C4H8, C3H6O, (E)—CH═CHC2H4, (E)—CH═CHCH2O, —C≡C—; R1 is alkyl, and may contain up to 20 carbon atoms and may be branched or a straight chain; provided that at least one of, A1, A2, A3 is selected from 1,4-disubstituted thiophene.Type: GrantFiled: June 30, 2000Date of Patent: December 25, 2001Assignee: QinetiQ LtdInventors: Warren L Duffy, John W Goodby, Stephen M Kelly
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Patent number: 6077961Abstract: Process for purifying a thiophene contaminated by mercaptans comprising selectively oxidizing the mercaptans to form polysulphides, then distilling the thiophene in this way.Type: GrantFiled: February 17, 1999Date of Patent: June 20, 2000Assignee: Elf Atochem S.A.Inventors: Yves Labat, Piet Luyendijk
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Patent number: 5888421Type: GrantFiled: September 19, 1994Date of Patent: March 30, 1999Assignee: The Secretary of State for Defence in her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern IrelandInventors: Kenneth Johnson Toyne, John William Goodby, Alexander Seed, George William Gray, Damien Gerad McDonnel, Edward Peter Raynes, Sally Elizabeth Day, Kenneth John Harrison, Michael Hird
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Patent number: 5726326Abstract: A method of preparing a thiophene comprises reacting an organic compound containing a chain of at least 4 C atoms linked by single or double bonds with a source of sulphur in the vapor phase, in the presence of a supported catalyst, the catalyst having the composition(Fe.sub.0-1 M.sub.1-0)O.sub.nwherein M is a metal of Group VA, VIA or VIIA; and n is an appropriate value.Type: GrantFiled: June 24, 1996Date of Patent: March 10, 1998Assignee: Shell Research LimitedInventors: Graham John Hutchings, Richard William Joyner, Barry William Luke Southward, Russel Andrew Stewart, Lance Svend Fuller
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Patent number: 5534639Abstract: There are disclosed novel hydroquinone derivatives of the formulas: ##STR1## The derivatives of the formula (I) have various pharmacological activities such as antioxidation in living bodies and are useful as medicaments, and the derivatives of the formula (II) are intermediates for the production thereof.Type: GrantFiled: April 24, 1995Date of Patent: July 9, 1996Assignee: Takeda Chemical Industries, Ltd.Inventors: Hirotomo Masuya, Masayoshi Yamaoka
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Patent number: 5514289Abstract: Novel dihydrobenzothiophenes prepared via condensation of arylthiols and carbonyl or epoxide containing reagents have been found to be effective antioxidant and antiwear additives in lubricant applications. These additives are made from relatively low cost mercaptans and carbonyl compounds in a one-step high yield reaction.Type: GrantFiled: April 13, 1995Date of Patent: May 7, 1996Assignee: Mobil Oil CorporationInventors: Halou Oumar-Mahamat, Andrew G. Horodysky, Andrew Jeng
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Patent number: 5512685Abstract: The invention relates to a process for the preparation of 3-substituted thiophenes in which the substituent is a C.sub.4 -C.sub.18 -alkyl group. According to the invention, the preparation is carried out by allowing an alkali metal salt of a C.sub.4 -C.sub.18 -alkyl-succinic acid to react with a compound of sulfur and phosphorus, e.g. tetraphosphorus decasulfide, in an organic solvent at a temperature of 100.degree.-180.degree. C., the product obtained being 3-(C.sub.4 -C.sub.18 -alkyl)thiophene. The said reaction may be the last step in a process in which the initial material is maleic acid anhydride with which .alpha.-C.sub.4 -C.sub.18 -alkene is combined so that C.sub.4 -C.sub.18 -alkenylsuccinic acid anhydride is obtained, whereafter this is hydrogenated catalytically to produce C.sub.4 -C.sub.18 -alkylsuccinic acid anhydride. This is thereafter reacted with an alkali metal hydroxide so that an alkali salt of the C.sub.4 -C.sub.Type: GrantFiled: December 20, 1994Date of Patent: April 30, 1996Assignee: Neste OyInventors: Hannele Jarvinen, Leila Lahtinen, Osmo Hormi, Jan Nasman, Anna-Liisa Tammi
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Patent number: 5496500Abstract: Liquid crystal compounds of formula (I) are described, where formula (I) is given as R.sub.1 --A--(X.sub.m --(B).sub.n --R.sub.2 where A is selected from nathyl, flourinated naphthyl, brominated naphthyl, B is selected from phenyl, methylated phenyl, brominated phenyl, fluorinated phenyl, thiophene, pyrimidine and pyridine, R.sub.1 and R.sub.2 are independently selected from alkyl, alkoxy, alkynyl, thioalkyl, Br, CN, SCN, NCS, perfluoroalkyl, perfluoroalkoxy and hydrogen, X is selected from C.tbd.C, COO and C.tbd.C, m is 0 or 1, n is 0 or 1 where m is 1 and n is 0 where m is 0; provided that where A is naphthyl, n is 1 and m is 0 then B is selected from methylated phenyl, brominated phenyl, thiophene, pyrimidine and pyridine; and further provided that where A is naphthyl, X is C.tbd.C, m is 1 and n is 1, then B is selected from thiophene, pyrimidine and pyridine.Type: GrantFiled: August 1, 1994Date of Patent: March 5, 1996Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain & Northern IrelandInventors: Kenneth J. Toyne, John W. Goodby, Alexander Seed, George W. Gray, Damien G. McDonnel, Edward P. Raynes, Sally E. Day, Kenneth J. Harrison, Michael Hird
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Patent number: 5459264Abstract: A method for reducing an .alpha.,.beta.-unsaturated ketone of the present invention includes the step of treating the .alpha.,.beta.-unsaturated ketone with a silyl compound in the presence of a Lewis acid and alcohol to selectively reduce the carbonyl group of the .alpha.,.beta.-unsaturated ketone. According to this method, a deoxy-compound can be obtained from the .alpha.,.beta.-unsaturated ketone by selectively reducing the carbonyl group without reducing an .alpha.,.beta.-unsaturated bond.Type: GrantFiled: December 17, 1993Date of Patent: October 17, 1995Assignee: Shionogi Seiyaku Kabushiki KaishaInventors: Mitsuru Imuta, Makoto Kobayashi, Teruo Iizuka
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Patent number: 5368876Abstract: Flavoring and perfume compositions as well as flavored foodstuffs and allied products and also perfumed products characterized by a content of one or more substituted thiophenes with the formula ##STR1## wherein none, one or two of the dotted lines represent a double bond with the proviso that no cumulated double bonds are present.Type: GrantFiled: October 28, 1992Date of Patent: November 29, 1994Assignee: Naarden-International N.V.Inventors: Henry L. A. Van den Heuvel, Paulus P. J. M. Jaegers
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Patent number: 5294522Abstract: A novel photochromic compound as a photoreactive material making use of photochromism is provided, which compound is expressed by the following formula (1) or (2)): ##STR1## wherein R is alkyl, alkoxy, perfluoroalkyl or cyano; X.sub.1, X.sub.2, X.sub.3, X.sub.4, X.sub.5 and X.sub.6 are each H, halogen, alkyl, alkoxy, cyano, alkanoyloxy or alkyloxycarbonyl, or a substituted or unsubstituted benzene ring is formed by condensation between at adjacent groups among X.sub.1 to X.sub.6 ; Y is Y.sub.1 C=CY.sub.2, O, S, SO, SO.sub.2 or NY.sub.3 wherein Y.sub.1 and Y.sub.2 are each as defined in the case of the above X.sub.1 to X.sub.6 and Y.sub.3 is H, alkyl, alkanoyl, alkyloxycarbonyl or aryl; and the symbol refers to occurrence of E- or Z-isomer, and which compound is useful as rewritable optical memory element or photo-display element and also as solar energy-storage material, duplicating material, masking material, optical filter, toys, etc.Type: GrantFiled: March 2, 1993Date of Patent: March 15, 1994Assignee: Chisso CorporationInventors: Manabu Uchida, Masahiro Irie
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Patent number: 5283355Abstract: Compounds of the Formula (5) and processes for their preparation and use, particularly in the manufacture of unsymmetrical triphenodioxazine dyes: ##STR1## wherein: Y is H, alkyl, substituted alkyl, alkoxy, Cl or Br;R is a group of Formula (3) ##STR2## R.sup.1 and R.sup.2 are each independently alkyl, or R.sup.1 and R.sup.2 together with the carbon atom to which they are attached form an optionally substituted 4, 5 or 6 membered alicyclic or heterocyclic ring;R.sup.3 is H;Z is Cl, Br or A--NH; andA is H or the residue of a primary amine.Type: GrantFiled: October 22, 1991Date of Patent: February 1, 1994Assignee: Imperial Chemical Industries PLCInventor: William J. E. Norris
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Patent number: 5268448Abstract: Substituted thiophenes of general formula: ##STR1## in which: R represents hydrogen atom or an aliphatic group containing from 1 to 4 carbon atoms,X and Z may be identical or different and represent a hydrogen atom or a fluorine atom,Y represents an at least partially fluorinated aliphatic or aromatic group,m represents an integer equal to or greater than 1, andn represents an integer such that 0.ltoreq.n.ltoreq.12.The invention also relates to the electrically conducting polymers containing recurring units derived from monomers chosen from the substituted thiophenes.Type: GrantFiled: June 16, 1992Date of Patent: December 7, 1993Assignee: Solvay S.A.Inventors: Werner Buechner, Marc Lemaire, Jean Roncali, Robert Garreau, Francis Garnier, Etienne Hannecart
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Patent number: 5166362Abstract: The invention relates to the manufacture of thiophene by catalytic dehydrogenation of tetrahydrothiophene.Ruthenium sulphide, optionally mixed with sulphides of one or more other transition metals is employed as bulk or supported catalyst.Type: GrantFiled: August 22, 1991Date of Patent: November 24, 1992Assignee: Societe Nationale Elf Aquitaine (Production)Inventors: Christian Forquy, Michel Lacroix, Michele Breysse
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Patent number: 4975452Abstract: Novel thromboxane receptor antagonists are disclosed, having the formula ##STR1## wherein: A is aryl, optionally substituted withhalogen,lower alkoxy,carboalkoxy,lower alkyl,alkylamino, orphenyl;X is --CH.sub.2 or --NH;R.sub.1 is COOH, COO-alkali metal (such as Na, K, or Li), COO-lower alkyl, CONHSO.sub.2 R.sub.2, or 5-tetrazolyl;R.sub.2 is lower alkyl or aryl;m is 0, 1, or 2; andp is 2, 3, 4 or 5.Also disclosed are novel intermediates of formula I compounds.Type: GrantFiled: June 2, 1989Date of Patent: December 4, 1990Assignee: E. R. Squibb & Sons, Inc.Inventors: Philip M. Sher, Steven E. Hall
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Patent number: 4874780Abstract: Deuterated aromatic aldehydes of the formula: ##STR1## where Ar is substituted phenyl, and derivatives thereof represented by the formula: ##STR2## where Ar is substituted or unsubstituted phenyl, and X.sub.1 and X.sub.2 are substituted hetero atoms or together with the carbon to which they are attached from a heterocycle. These compounds are useful as anticancer agents.Type: GrantFiled: March 11, 1987Date of Patent: October 17, 1989Assignee: Norsk Hydro a.s.Inventors: Bernt Borretzen, Rolf O. Larsen, Erik O. Pettersen, John M. Dornish, Rolf Oftebro
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Patent number: 4808687Abstract: The organopolysiloxanes of this invention comprise repeating units consisting essentially of a five-membered ethylenically unsaturated heterocyclic ring containing a diorganosiloxane group bonded to the two cyclic carbon atoms adjacent to the hetero atom, which can be nitrogen, oxygen or sulfur. This invention encompasses homopolymers of said repeating units and copolymers comprising said units and diorganosiloxane units such as dimethylsiloxane. The present polymers are characterized by their high resistance to thermally induced degradation, and do not exhibit a significant weight loss at temperatures up to 300 degrees C.Type: GrantFiled: January 4, 1988Date of Patent: February 28, 1989Assignee: Dow Corning CorporationInventor: Stephanie A. Burns
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Patent number: 4783541Abstract: The invention relates to a process for isomerizing alkylthiophenes on zeolite catalysts. In particular, methylthiophene and ethylthiophene can be isomerized by this process. Suitable zeolites are in particular synthetic zeolites of the pentasil, mordenite of faujasite type in their acid form.Type: GrantFiled: December 18, 1987Date of Patent: November 8, 1988Assignee: Hoechst AktiengesellschaftInventors: Klaus Eichler, Ernst I. Leupold
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Patent number: 4438282Abstract: Sulfides prepared by reacting a sulfoxide with a hydrazine or hydroxylamine derivative or a quaternary salt thereof are useful starting materials for the preparation of drugs, pesticides and dyes.Type: GrantFiled: June 23, 1982Date of Patent: March 20, 1984Assignee: BASF AktiengesellschaftInventors: Hartmut Lardon, Guenther Seybold
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Patent number: 4263443Abstract: Hydrocarbons and esters and/or acids are produced by heating aldehydes in the presence of an alcohol or an alcohol equivalent and in the presence of an iodine or bromine moiety and a rhodium or iridium catalyst.Type: GrantFiled: November 22, 1978Date of Patent: April 21, 1981Assignee: Halcon Research and Development Corp.Inventor: John F. White
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Patent number: 4210552Abstract: Certain sulfonium salts are herein described which are useful corrosion inhibitors in aqueous acidic cleaning solutions, even in the presence of ferric ions.Type: GrantFiled: September 28, 1978Date of Patent: July 1, 1980Assignee: The Dow Chemical CompanyInventors: Wayne W. Frenier, William J. Settineri
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Patent number: 4174447Abstract: A decarboxylation process for coupling aromatic compounds wherein cyclic hydrocarbons and heterocyclic compounds having at least one labile ring hydrogen are reacted with the mono silver salts of aromatic carboxylic acids, or mono silver salts of unsaturated compounds such as .alpha.,.beta.-ethylenically unsaturated acid compounds, or silver trifluoroacetate, or the mono silver salts are reacted with themselves, by heating to temperatures of 100.degree. to 500.degree. C. at pressures of 0.1 to 10 atmospheres, or by irradiating the reactants with ultraviolet light of 200 to 400 nanometers at temperatures of -30.degree. to 150.degree. C. The resulting dimers, trimers, polysubstituted polyphenyls, polyheterocyclics and trifluoromethylated aromatics are useful as heat transfer media, as intermediates for high molecular weight polymers, pesticides and petroleum additives, and as scintillation counters.Type: GrantFiled: February 26, 1975Date of Patent: November 13, 1979Assignee: Standard Oil Company (Indiana)Inventor: Ellis K. Fields