Patents by Inventor Shinji Nishii
Shinji Nishii has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20040225145Abstract: There is provided a process for producing a phosphite of the formula (I): 1Type: ApplicationFiled: May 6, 2004Publication date: November 11, 2004Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Kikumitsu Inoue, Shinji Nishii, Taketoshi Kikuchi
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Patent number: 5994542Abstract: A process for producing 1-substituted tetrahydroquinazolines represented by the formula (III): ##STR1## wherein Z represents a methylene group which is optionally substituted by an alkyl group; R.sub.6 represents an alkyl group or an aralkyl group; R.sub.1 and R.sub.2 independently represent a hydrogen atom, a halogen atom, a nitro group, an azido group, an alkyl group, an alkenyl group, an aralkyl group, an alkoxy group, an alkoxycarbonyl group, an acyloxygroup, or an amino group represented by XNR.sub.4 R.sub.5 in which X represents a direct bond, an alkylene group or a carbonyl group, and N, R.sub.4 and R.sub.5 may form together a five- or six-membered heterocyclic ring or R.sub.4 and R.sub.5 independently represent an alkyl group or an acyloxy alkyl group; and R.sub.Type: GrantFiled: May 12, 1998Date of Patent: November 30, 1999Assignee: Sumitomo Chemical Company, LimitedInventors: Sachiko Asada, Masashi Komatsu, Shinji Nishii
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Patent number: 5981749Abstract: A process for producing isatoic anhydrides of the formula (II): ##STR1## which comprises reacting an anthranilic acid of formula (I): ##STR2## or a salt thereof with phosgene using a mixed solvent of water and an organic solvent miscible with water and inert to the reaction;conducting the reaction in the coexistence of an alkylpyridinium salt in an aqueous solvent; orusing a mixed solvent of water and a specific amount of an organic solvent substantially immiscible with water and inert to the reaction.Type: GrantFiled: June 5, 1998Date of Patent: November 9, 1999Assignee: Sumitomo Chemical Company LimitedInventors: Shinji Nishii, Masashi Komatsu, Hiroshi Ueda
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Patent number: 5973145Abstract: A process for producing isatoic anhydrides of the formula (II): ##STR1## which comprises reacting an anthranilic acid of formula (I): ##STR2## or a salt thereof with phosgene using a mixed solvent of water and an organic solvent miscible with water and inert to the reaction;conducting the reaction in the coexistence of an alkylpyridinium salt in an aqueous solvent; orusing a mixed solvent of water and a specific amount of an organic solvent substantially immiscible with water and inert to the reaction.Type: GrantFiled: June 5, 1998Date of Patent: October 26, 1999Assignee: Sumitomo Chemical Company, LimitedInventors: Shinji Nishii, Masashi Komatsu, Hiroshi Ueda
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Patent number: 5795984Abstract: A process for producing isatoic anhydrides of the formula (II): ##STR1## which comprises reacting an anthranilic acid of formula (I): ##STR2## or a salt thereof with phosgene using a mixed solvent of water and an organic solvent miscible with water and inert to the reaction; conducting the reaction in the coexistence of an alkylpyridinium salt in an aqueous solvent; or using a mixed solvent of water and a specific amount of an organic solvent substantially immiscible with water and inert to the reaction.Type: GrantFiled: December 26, 1996Date of Patent: August 18, 1998Assignee: Sumitomo Chemical Company LimitedInventors: Shinji Nishii, Masashi Komatsu, Hiroshi Ueda
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Patent number: 5780628Abstract: A process for producing an dioxoquinazoline of following formula (II): ##STR1## wherein R.sub.1 and R.sub.2 independently represent a hydrogen atom, a halogen atom, a nitro group, a lower alkyl group, an aralkyl group, an alkoxy group, an alkoxylcarbonyl group or a group represented by YNR.sub.3 R.sub.4, wherein Y represents a direct bond, a lower alkylene group or a carbonyl group, and R.sub.3 and R.sub.4 independently represent a lower alkyl group or N, R.sub.3 and R.sub.4 may bond together to form a five- or six-membered heterocycle which comprises reacting an anthranylamide of formula (I): ##STR2## wherein X, R.sub.1 and R.sub.2 are as defined above.Type: GrantFiled: January 31, 1997Date of Patent: July 14, 1998Assignee: Sumitomo Chemical Company, LimitedInventors: Masashi Komatsu, Shinji Nishii, Hiroshi Ueda
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Patent number: 5756738Abstract: A process for producing 1-substituted tetrahydroquinazolines represented by the formula (III): ##STR1## as defined herein which comprises reacting tetrahydroquinazolines represented by the formula (I): ##STR2## with hexamethyldisilazane; and reacting the resultant product with a chloroalkanoate represented by the formula (II):Cl--Z--CO--O--R.sub.6 (II)in the presence of an iodide of an alkaline metal, followed by desilylation.Type: GrantFiled: November 13, 1996Date of Patent: May 26, 1998Assignee: Sumitomo Chemical Company, LimitedInventors: Shinji Nishii, Masashi Komatsu, Sachiko Takeuchi
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Patent number: 5463103Abstract: The object of the present invention is to provide a process for producing 1,4-dicyano-2-butene in a high yield and in an industrially advantageous way.The present invention relates to a process for producing 1,4-dicyano-2-butene which comprises reacting a butene derivative represented by the formula [1]R.sub.1 --CH.sub.2 --CH.dbd.CH--CH.sub.2 --R.sub.2 [1]or the formula [2]R.sub.3 --CH.sub.2 --CHR.sub.4 --CH.dbd.CH.sub.2 [2]wherein each of R.sub.1 and R.sub.3 represents a hydroxy group, lower acyloxy group, lower alkoxy group or cyano group; and each of R.sub.2 and R.sub.4 represents a hydroxy group, lower acyloxy group or lower alkoxy group, with hydrogen cyanide in the presence of a catalyst comprising a product prepared from a cuprous halide, a non-aromatic amine hydrohalide and at least one member selected from the group consisting of Lewis acids and basic compounds.Type: GrantFiled: February 24, 1994Date of Patent: October 31, 1995Assignee: Sumitomo Chemical Company, LimitedInventors: Shinji Nishii, Shigeo Wake, Takeshi Ogawa
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Patent number: 5200561Abstract: Disclosed is a process for producing an optically active amine represented by the formula (IV) ##STR1## wherein R.sub.7 and R.sub.8 each denote an alkyl group, aryl group or aralkyl group, providing that they do not denote the same group at the same time, and * indicates an asymmetric carbon atom, which comprises reacting an asymmetric reducing agent obtained from (1) an optically active amine derivative represented by the formula (I) ##STR2## wherein R.sub.1 denotes an alkyl group, aryl group or aralkyl group; R.sub.2 denotes a hydrogen atom, alkyl group or aralkyl group; R.sub.3 denotes an aryl group or a substituent represented by the formula (II) ##STR3## wherein R.sub.4 and R.sub.5 each denote a hydrogen atom, aryl group or aralkyl group, and * is as defined above, (2) a metal borohydride and (3) sulfuric acid, with either the syn-isomer or the anti-isomer of an oxime derivative represented by the formula (III) or with a mixture rich in either one of the two isomers ##STR4## wherein R.sub.Type: GrantFiled: October 7, 1991Date of Patent: April 6, 1993Assignee: Sumitomo Chemical Company, LimitedInventors: Naoto Konya, Yukio Yoneyoshi, Yoji Sakito, Shinji Nishii, Gohfu Suzukamo, Hiroko Sakane