Patents by Inventor Masayoshi Minai

Masayoshi Minai 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).

  • Patent number: 5723610
    Abstract: Disclosed in this invention are the phenylpyrimidine derivatives represented by the general formula I: ##STR1## the alcohols represented by the formula: ##STR2## usable as starting material for the preparation of the phenylpyrimidine derivatives, and the processes for preparing such derivatives. The phenylpyrimidine derivatives of the formula I according to the present invention have very excellent properties as a liquid crystal compound and can be utilized effectively for the production of liquid crystal elements.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: March 3, 1998
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takayuki Higashii, Masayoshi Minai, Isao Kurimoto, Shoji Toda, Takeshi Tani, Chizu Sekine, Koichi Fujisawa
  • Patent number: 5707547
    Abstract: The present invention relates to trans-olefin compounds represented by the general formula (1) useful as an ingredient of liquid crystal composition, trans-olefin compounds useful as intermediate of pesticides, medical drugs, liquid crystal materials and the like, a process for producing those trans-olefin compounds, a liquid crystal composition containing the trans-olefin compound as an active ingredient, and a liquid crystal element using the liquid crystal composition. ##STR1## (In the general formula (1), R.sup.1, A.sup.1, A.sup.2, A.sup.3, Z and R.sup.2 are same as defined in the specification. Also, m, p, q, n, r, s and t are each an integer as defined in the specification.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: January 13, 1998
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yukari Fujimoto, Naoyuki Takano, Takayuki Higashii, Masayoshi Minai, Chizu Sekine, Kayoko Ueda, Koichi Fujisawa, Kyoko Endo, Takeshi Tani
  • Patent number: 5693251
    Abstract: An optically active phenol useful in the preparation of liquid crystalline compounds which is represented by the formula (V): ##STR1## wherein R.sub.2 represents an alkyl or alkoxyalkyl group having 1 to 20 carbon atoms optionally substituted by halogen atoms; Z' represents ##STR2## wherein q represents a number of 1 to 5 and * indicates asymmetric carbon atom; l represents a number of 2; t represents a number of 1 to 5; s represents a number of 0 or 1.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: December 2, 1997
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takayuki Higashii, Isao Kurimoto, Shoji Toda, Masayoshi Minai, Takeshi Tani, Chizu Kawakami, Koichi Fujisawa
  • Patent number: 5662828
    Abstract: A compound having an unsaturated side chain represented by the formula: ##STR1## in which A and B are the same and different and represent an aromatic or heterocyclic group or either one of A and B represents a single bond; X.sub.1, X.sub.2 and X.sub.3 are the same or different and represent a hydrogen atom or a lower alkyl group; R.sub.1 represents a saturated or unsaturated alkyl group which may be substituted with a halogen atom or an alkoxyalkyl group which may be substituted with a halogen atom; X represents --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C-- or a single bond; n is an integer of 0 to 6; q is an integer of 1 to 15; p and s are each 0 or 1; and the asterisk * indicates an asymmetric carbon atom, which is useful as an intermediate of a liquid crystal or a monomer of a liquid crystalline polymer.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 2, 1997
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yoshiaki Tsubata, Kayoko Ueda, Koichi Fujisawa, Takayuki Higashii, Masayoshi Minai, Naoyuki Takano, Yukari Fujimoto
  • Patent number: 5658489
    Abstract: A diphenylacetylene compound of the formula [1]: ##STR1## wherein R is a C.sub.1 -C.sub.12 alkyl group, a C.sub.2 -C.sub.12 alkenyl group or a C.sub.2 -C.sub.16 alkoxyalkyl group; X.sup.1, X.sup.2, X.sup.3, X.sup.4, Y.sup.1, Y.sup.2, Y.sup.3 and Y.sup.4 are independently from each other a --CH-- group, a --CF-- group or a nitrogen atom;A is a hydrogen atom, a fluorine atom, a trifluoromethyl group, a trifluoromethoxy group, a cyano group, a 4-R.sup.1 -(cycloalkyl) group, 4-R.sup.1 -(cycloalkenyl) group or a R.sup.1 --(O).sub.m group in which R.sup.1 is a C.sub.1 -C.sub.12 alkyl group, a C.sub.2 -C.sub.12 alkenyl group or a C.sub.2 -C.sub.12 alkynyl group; and m is 0 or 1, which has an excellent anisotropy of refractive index and a low viscosity and is useful as a component of a liquid crystal composition.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: August 19, 1997
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takayuki Higashii, Yukari Fujimoto, Masayoshi Minai, Tsutomu Matsumoto
  • Patent number: 5659051
    Abstract: There is disclosed a process of producing a 2-cyano-4-oxo-4H-benzopyran compound of the general formula (2): ##STR1## wherein R.sup.1 and R.sup.2 are independently hydrogen, halogen, hydroxy, C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.5 alkoxy, nitro or a group of the RCONH wherein R is C.sub.1 -C.sub.20 alkyl, phenyl, phenyl-substituted (C.sub.1 -C.sub.20) alkyl, phenyl (C.sub.1 -C.sub.20)alkoxyphenyl or (C.sub.1 -C.sub.20) alkoxyphenyl. This production process is characterized in that a carboxamide of the general formula (1): ##STR2## wherein R.sup.1 and R.sup.2 are each as defined above, is reacted with a dehydrating agent in the presence of a pyridine compound of the general formula (4): ##STR3## wherein A.sup.1 and A.sup.2 are independently hydrogen or C.sub.1 -C.sub.5 alkyl.
    Type: Grant
    Filed: July 11, 1994
    Date of Patent: August 19, 1997
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takayuki Higashii, Hideki Ushio, Yukari Fujimoto, Tsutomu Matsumoto, Masayoshi Minai, Katsuichi Yasunaga, Hiroshi Sogabe, Takahiro Kotera
  • Patent number: 5637736
    Abstract: A 1-bromoalkylbenzene derivative is prepared by reacting a phenylalkene derivative with hydrogen bromide in the presence of a non-polar solvent. The phenylalkene derivative is prepared by reacting an alkenyl halide with metal magnesium to form a Grignard reagent, and then reacting the Grignard reagent with a benzyl halide derivative. An allyl Grignard reagent is prepared by reacting continuously an allyl halide derivative with metal magnesium in an organic solvent, in which the allyl halide derivative and metal magnesium are continuously added to the reaction system and the allyl Grignard reagent formed is continuously removed from the reaction system. The processes provide the intended compounds in high yields, high selectivities and high purities.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: June 10, 1997
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hiroaki Fujishima, Yasunobu Miyamoto, Masayoshi Minai, Tsutomu Matsumoto, Hideki Ushio, Takayuki Higashii
  • Patent number: 5621129
    Abstract: A tertiary phosphine compound of the formula (1): ##STR1## in which R.sup.1 and R.sup.1' are hydrogen atoms or together form --CH.dbd.CH--CH.dbd.CH--; R.sup.2 and R.sup.3 together form a group of the formula (a): ##STR2## in which --.circle-solid. represent a bond to be bonded to the R.sup.3 group, and --.smallcircle. represents a bond to be bonded to the R.sup.2 group when R.sup.1 and R.sup.1 ' together form --CH.dbd.CH--CH.dbd.CH--, or when R.sup.1 is a hydrogen atom, R.sup.2 and R.sup.3 together form --CH.dbd.CH--CH.dbd.CH-- or R.sup.2 is a hydrogen atom and R.sup.3 is a substituted or unsubstituted alkyl group, or a substituted or unsubstituted phenyl group; A.sup.1 is a 3-trifluoromethylphenyl group or a 3,5-bis(trifluoromethyl)phenyl group when R.sup.1 is a hydrogen atom and R.sup.2 and R.sup.3 together form --CH.dbd.CH--CH.dbd.CH--, or a substituted or unsubstituted phenyl group when R.sup.1 is not a hydrogen atom or when R.sup.2 and R.sup.3 do not together form --CH.dbd.CH--CH.dbd.CH--.
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: April 15, 1997
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Tamio Hayashi, Masayoshi Minai, Kazunori Iwakura
  • Patent number: 5554317
    Abstract: A compound having an unsaturated side chain represented by the formula: ##STR1## in which A and B are the same and different and represent an aromatic or heterocyclic group or either one of A and B represents a single bond; X.sub.1, X.sub.2 and X.sub.3 are the same or different and represent a hydrogen atom or a lower alkyl group; R.sub.1 represents a saturated or unsaturated alkyl group which may be substituted with a halogen atom or an alkoxyalkyl group which may be substituted with a halogen atom; X represents --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.ident.C-- or a single bond; n is an integer of 0 to 6; q is an integer of 1 to 15; p and s are each 0 or 1; and the asterisk * indicates an asymmetric carbon atom, which is useful as an intermediate of a liquid crystal or a monomer of a liquid crystalline polymer.
    Type: Grant
    Filed: July 13, 1994
    Date of Patent: September 10, 1996
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yoshiaki Tsubata, Kayoko Ueda, Koichi Fujisawa, Takayuki Higashii, Masayoshi Minai, Naoyuki Takano, Yukari Fujimoto
  • Patent number: 5545345
    Abstract: A ferroelectric chiral smectic liquid crystal mixture comprising a compound of the formula (I): ##STR1## and at least one compound selected from the group consisting of a compound of the formula (II): ##STR2## and a compound of the formula (III): ##STR3##
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: August 13, 1996
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Chizu Sekine, Takeshi Tani, Kayoko Ueda, Koichi Fujisawa, Takayuki Higashii, Yukari Fujimoto, Shoji Toda, Masayoshi Minai
  • Patent number: 5539115
    Abstract: Disclosed in this invention are the phenylpyrimidine derivatives represented by the general formula I: ##STR1## the alcohols represented by the formula: ##STR2## usable as starting material for the preparation of the phenylpyrimidine derivatives, and the processes for preparing such derivatives. The phenylpyrimidine derivatives of the formula I according to the present invention have very excellent properties as a liquid crystal compound and can be utilized effectively for the production of liquid crystal elements.
    Type: Grant
    Filed: October 8, 1993
    Date of Patent: July 23, 1996
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takayuki Higashii, Masayoshi Minai, Isao Kurimoto, Shoji Toda, Takeshi Tani, Chizu Sekine, Koichi Fujisawa
  • Patent number: 5534188
    Abstract: An acetylene derivative represented by general formula (I): ##STR1## wherein R.sup.1 is saturated or unsaturated alkyl group having 3-20 carbon atoms, R.sup.2 is saturated or unsaturated alkyl group having 1-20 carbon atoms which may optionally be substituted by halogen atom or alkoxyalkyl group having 2-20 carbon atoms, A and B represent phenylene group or the like or taken as --A--B-- represent naphthalene group or the like, m and s are each 0 or 1, n is integer of 1-6, and * means asymmetric carbon atom; a process for producing said acetylene derivative, a liquid crystal composition using the same as active ingredient, and a liquid crystal element using said composition.
    Type: Grant
    Filed: June 24, 1994
    Date of Patent: July 9, 1996
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masayoshi Minai, Takayuki Higashii, Shoji Toda, Naoyuki Takano, Kayoko Ueda, Koichi Fujisawa
  • Patent number: 5523437
    Abstract: A tertiary phosphine compound of the formula (1): ##STR1## wherein R.sup.1 and R.sup.2 represent independently from each other a hydrogen atom or a methyl group, or together form --CH.dbd.CH--CH.dbd.CH--; R.sup.3 is a hydrogen atom or a cycloalkyl group having 5 to 7 carbon atoms or a lower alkyl group which may be substituted with a halogen atom, a lower alkoxy group, a lower alkoxyalkoxy group or a phenyl group; X.sup.1 is a halogen atom when both R.sup.1 and R.sup.2 are hydrogen atoms, or a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group when at least one of R.sup.1 and R.sup.2 is not a hydrogen atoms; and m is an integer of 1 to 5, which is useful as a ligand of a transition metal complex that can catalyze various reactions.
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: June 4, 1996
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Tamio Hayashi, Yasuhiro Uozumi, Kazunori Iwakura, Isao Kurimoto, Masayoshi Minai
  • Patent number: 5498721
    Abstract: A process for producing a thiophene derivative represented by a general formula (2) involves catalytically reducing a compound represnted by the general formula (1) with hydrogen in a solvent mixture of at least one of alcohol and water in the presence of a palladium catalyst soluble in organic solvents. A thiophene derivative is useful in preparing biotin (Vitamin H).
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: March 12, 1996
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masahiko Mizuno, Isao Kurimoto, Norihiko Hirata, Toshiya Takahashi, Masayoshi Minai, Takahiro Yamamoto, Tadashi Mizuno, Yasunobu Miyamoto
  • Patent number: 5447659
    Abstract: Disclosed are novel active benzene derivatives represented by the general formula (I): ##STR1## (wherein X represents --CCO--, --OCO--, --CH.sub.2 C-- or --OCH.sub.2 --; A represents a hydrogen atom, a halogen atom or an alkyl or alkoxyl group having 1 to 20 carbon atoms; R represents an alkyl group having 1 to 20 carbon atoms; l and m each represents a number of 1 or 2, n represents a number of 0 or 1, but when n is 0 the sum of l and m is 3 or less; and * indicates asymmetric carbon atom), a process for producing the same, liquid-crystalline substances containing said derivatives as active ingredient, and optical switching elements utilizing the liquid crystal compositions containing said liquid-crystalline substances.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: September 5, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takayuki Higashii, Masayoshi Minai
  • Patent number: 5422038
    Abstract: Optically active naphthalene derivatives including optically active naphthylcarboxylic acid derivative, hydroxynaphthalene derivative, alkoxynaphthylalkanol derivative and alkylnaphthylalkanol derivative have the following structural formula: ##STR1## wherein R.sup.1 denotes an alkyl group of 3-20 carbon atoms, R.sup.2 denotes an alkyl group of 1-20 carbon atoms optionally substituted with halogen atom(s) or an alkoxyalkyl group of 2-20 carbon atoms optionally substituted with halogen atom(s), X denotes --COO-- or --OCO--, k, l and m denotes 0 or 1 respectively, n denotes an integer of 0-6, p denotes 0 or 1, and the asterisk indicates an asymmetric carbon atom, with the proviso that when k is 0, l and m are not 1 at the same time, and when k is 1, m is 1, and when n is 0 and m is 1, X is --COO--.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: June 6, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shoji Toda, Takayuki Higashii, Isao Kurimoto, Masayoshi Minai, Chizu Sekine, Takeshi Tani, Koichi Fujisawa
  • Patent number: 5395977
    Abstract: A process for producing optically active 4-hydroxy-2-cyclopentenone [1] which comprises reacting 4-hydroxy-2-cyclopentenone represented by the formula: ##STR1## with an optically active propargyl alcohol derivative represented by the general formula: ##STR2## wherein R and R.sup.1 each independently represent a halogenated phenyl group, an alkylphenyl group, or an alkyl group which may be substituted with one or more halogen atom(s), and * indicates an asymmetric carbon atom, to form an optically active complex [3] consisting essentially of optically active 4-hydroxy-2-cyclopentenone represented by the formula [1] ##STR3## wherein * indicates an asymmetric carbon atom, and the optically active propargyl alcohol derivative [2], and then decomposing the optically active complex [3].
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: March 7, 1995
    Assignee: Sumitomo Chemical Company, Ltd.
    Inventors: Fumio Toda, Yorihiko Inoue, Masayoshi Minai
  • Patent number: 5389293
    Abstract: Disclosed are herein optically active benzene derivatives represented by the formula (I): ##STR1## preparation processes therefor, liquid crystal composition containing such benzene derivatives as liquid-crystalline compound, and a light switching element using said liquid crystal composition as liquid crystal element, wherein R.sub.1, R.sub.2, x, y, z, m, p and s are as defined in the specification.
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: February 14, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takayuki Higashii, Isao Kurimoto, Shoji Toda, Masayoshi Minai, Takeshi Tani, Chizu Kawakami, Koichi Fujisawa
  • Patent number: 5385693
    Abstract: Disclosed herein are optically active carboxylic acid or acid halide compounds of formula III: ##STR1## Wherein R.sub.2 represents an optically active alkyl or alkoxyalkyl group having 3 to 15 carbon atoms optionally substituted by halogen atoms; R' represents a hydroxyl group or a halogen atom; k is 0 or 1; and n represents an integer of 1 to 6.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: January 31, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takayuki Higashii, Isao Kurimoto, Shoji Toda, Masayoshi Minai, Takeshi Tani, Chizu Kawakami, Koichi Fujisawa, Kiyoshi Imamura
  • Patent number: 5374376
    Abstract: Disclosed are herein optically active aromatic compounds represented by the formula (I): ##STR1## wherein X represents --COO-- or --OCO--; Y represents --COO--, --OCO-- or --O--; R.sub.2 represents an alkyl or alkoxyalkyl group having 1 to 20 carbon atoms unsubstituted or substituted by a halogen atom; R.sub.1 represents an alkyl group having 3 to 20 carbon atoms;Z represents ##STR2## wherein p represents a number of 1 to 5 and * indicates an asymmetric carbon atom; l and k each represents a number of 1 or 2; m and s each represents a number of 0 or 1, which are useful as a liquid crystal.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: December 20, 1994
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takayuki Higashii, Isao Kurimoto, Shoji Toda, Masayoshi Minai, Shigeaki Chika, Koichi Fujisawa, Kiyoshi Imamura