Patents by Inventor Kazuyuki Wachi

Kazuyuki Wachi 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: 5756730
    Abstract: A process for preparing a compound of the formula (I) ##STR1## in which, R.sup.1 and R.sup.2 are the same or different and each is hydrogen or C.sub.1 -C.sub.6 alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a heterocyclic ring which is unsubstituted or substituted and is a 5-membered or 6-membered N-heterocycle which optionally has a further heteroatom which is oxygen, nitrogen or sulfur; E is methylene; ring A is a unsubstituted or unsubstituted aryl ring, or a substituted or an unsubstituted heteroaryl ring; R.sup.3 is a C.sub.1 -C.sub.6 alkyl and R.sup.4 is hydrogen, or R.sup.3 and R.sup.4 together are a group of the formula --(CR.sup.a R.sup.b).sub.m --C(.dbd.Y)-- (IV), wherein each of R.sup.a and R.sup.b is hydrogen or C.sub.1 -C.sub.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: May 26, 1998
    Assignee: Sankyo Company, Limited
    Inventors: Atsusuke Terada, Yoshio Iizuka, Kazuyuki Wachi, Kenji Fujibayashi
  • Patent number: 5723481
    Abstract: Described herein are of formula (I): ##STR1## and pharmaceutically acceptable salts thereof are analgesics and anti-inflammatory agents as well having anti-ulcer and 5-lipoxygenase inhibitory activities.
    Type: Grant
    Filed: June 16, 1994
    Date of Patent: March 3, 1998
    Assignee: Sankyo Company, Limited
    Inventors: Atsusuke Terada, Kazuyuki Wachi, Hachio Miyazawa, Yoshio Iizuka, Kazuo Hasegawa, Keiichi Tabata
  • Patent number: 5698576
    Abstract: Described herein are compounds of formula (I): ##STR1## ?in which: R.sup.1 and R.sup.2 are hydrogen, optionally substituted alkyl, cycloalkyl, alkenyl, aralkyl, arylalkenyl, aryl, aromatic heterocyclic, cyano or halogen; R.sup.3 is hydrogen, optionally substituted alkyl, aralkyl or acyl; R.sup.4 and R.sup.5 are hydrogen, optionally substituted alkyl, cycloalkyl, alkenyl, aralkyl, arylalkenyl, aryl or aromatic heterocyclic!; and pharmaceutically acceptable salts thereof are analgesics and anti-inflammatory agents as well having anti-ulcer and 5-lipoxygenase inhibitory activities.
    Type: Grant
    Filed: November 22, 1996
    Date of Patent: December 16, 1997
    Assignee: Sankyo Company, Limited
    Inventors: Atsusuke Terada, Kazuyuki Wachi, Hachio Miyazawa, Yoshio Iizuka, Kazuo Hasegawa, Keiichi Tabata
  • Patent number: 5679674
    Abstract: Optically active carboxamide derivatives having analgesic activity and being useful as an analgesic agent. The compounds have a general formula: ##STR1## (in the above formula, R.sup.1 represents a hydrogen or halogen atom;R.sup.2 represents a halogen atom;R.sup.3 represents a pyrrolidino or piperidino group;Y represents a methylene or carbonyl group; andn is an integer of 1 or 2) and pharmacologically acceptable salts thereof.
    Type: Grant
    Filed: February 22, 1995
    Date of Patent: October 21, 1997
    Assignee: Sankyo Company, Limited
    Inventors: Atsusuke Terada, Yoshio Iizuka, Kazuyuki Wachi, Kenji Fujibayashi
  • Patent number: 5665752
    Abstract: Described herein are compounds of formula (I): ##STR1## and pharmaceutically acceptable salts thereof are analgesics and anti-inflammatory agents as well having anti-ulcer and 5-lipoxygenase inhibitory activities.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: September 9, 1997
    Assignee: Sankyo Company, Limited
    Inventors: Atsusuke Terada, Kazuyuki Wachi, Hachio Miyazawa, Yoshio Iizuka, Kazuo Hasegawa, Keiichi Tabata
  • Patent number: 5656758
    Abstract: A process for preparing a compound of the formula (I): ##STR1## in which, R.sup.1 and R.sup.2 each represents hydrogen or C.sub.1 -C.sub.6 alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a heterocycle; E represents methylene, sulfur, oxygen or imino group optionally substituted with C.sub.1 -C.sub.6 alkyl or aralkyl; ring A is aryl or heteroaryl ring, optionally substituted; R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkyl and R.sup.4 is hydrogen or R.sup.3 and R.sup.4 together represent a group of formula (IV):--(CR.sup.a R.sup.a).sub.m --C(.dbd.Y)-- (IV)(wherein R.sup.a and R.sup.a is C.sub.1 -C.sub.6 alkyl or hydrogen, up to a maximum of 3 alkyl groups, m is 1, 2, or 3, and Y is two hydrogens or oxygen); provided that when E represents a methylene group, then R.sup.3 is a C.sub.1 -C.sub.6 alkyl group or R.sup.3 and R.sup.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: August 12, 1997
    Assignee: Sankyo Company, Limited
    Inventors: Atsusuke Terada, Yoshio Iizuka, Kazuyuki Wachi, Kenji Fujibayashi
  • Patent number: 5512567
    Abstract: Analgesic compounds of the formula (I); ##STR1## in which, R.sup.1 and R.sup.2 each represents hydrogen or C.sub.1 -C.sub.6 alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a heterocycle; E represents oxygen or an imino group optionally substituted with C.sub.1 -C.sub.6 alkyl or aralkyl; ring A is an aryl or heteroaryl ring, optionally substituted; R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkyl and R.sup.4 is hydrogen or R.sup.3 and R.sup.4 together represent a group of formula (IV):--(CR.sup.a R.sup.a).sub.m --C(.dbd.Y)-- (IV)wherein R.sup.a and R.sup.a is C.sub.1 -C.sub.6 alkyl or hydrogen, up to a maximum of 3 alkyl groups, m is 1, 2, or 3, and Y is two hydrogens or oxygen; provided that when E represents a methylene group, then R.sup.3 is a C.sub.1 -C.sub.6 alkyl group or R.sup.3 and R.sup.4 together represent a group of the formula (IV).
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: April 30, 1996
    Assignee: Sankyo Company, Limited
    Inventors: Atsusuke Terada, Yoshio Iizuka, Kazuyuki Wachi, Kenji Fujibayashi
  • Patent number: 5354768
    Abstract: Compounds of formula (I): ##STR1## [in which: R.sup.1 and R.sup.2 are hydrogen, optionally substituted alkyl, cycloalkyl, alkenyl, aralkyl, arylalkenyl, aryl, aromatic heterocyclic, cyano or halogen; R.sup.3 is hydrogen, optionally substituted alkyl, aralkyl or acyl; R.sup.4 and R.sup.5 are hydrogen, optionally substituted alkyl, cycloalkyl, alkenyl, aralkyl, arylalkenyl, aryl or aromatic heterocyclic]; and pharmaceutically acceptable salts thereof are analgesics and anti-inflammatory agents as well having anti-ulcer and 5-lipoxygenase inhibitory activities.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: October 11, 1994
    Assignee: Sankyo Company, Limited
    Inventors: Atsusuke Terada, Kazuyuki Wachi, Hachio Miyazwa, Yoshio Iizuka, Kazuo Hasegawa, Keiichi Tabata
  • Patent number: 5270327
    Abstract: Analgesic compounds of the formula (I): ##STR1## in which, R.sup.1 R.sup.2 each represents hydrogen or C.sub.1 -C.sub.6 alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a 5-6-membered N-heterocyclic ring optionally having a further O, N, or S heteroatom; E represents methylene; ring A is an unsubstituted or substituted benzene or naphthalene; R.sup.3 and R.sup.4 together represent a group of formula (IV):--(CR.sup.a R.sup.a).sub.m --C(=Y)-- (IV)wherein R.sup.a and R.sup.a is C.sub.1 -C.sub.6 alkyl or hydrogen with up to a maximum of 3 alkyl groups, m is 1, 2, or 3, and Y is two hydrogens or oxygens.
    Type: Grant
    Filed: September 10, 1992
    Date of Patent: December 14, 1993
    Assignee: Sankyo Company, Limited
    Inventors: Atsusuke Terada, Yoshio Iizuka, Kazuyuki Wachi, Kenji Fujibayashi
  • Patent number: 5232939
    Abstract: Compounds of formula (I): ##STR1## and pharmaceutically acceptable salts thereof are analgesics and anti-inflammatory agents as well having anti-ulcer and 5-lipoxygenase inhibitory activities.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: August 3, 1993
    Assignee: Sankyo Company Limited
    Inventors: Atsusuke Terada, Kazuyuki Wachi, Hachio Miyazawa, Yoshio Iizuka, Kazuo Hasegawa, Keiichi Tabata
  • Patent number: 5021413
    Abstract: Analgesic compounds are of the general formula (I): ##STR1## in which, R.sup.1 and R.sup.2 each represents hydrogen or C.sub.1 -C.sub.6 alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a heterocycle; E represents methylene, sulfur, oxygen or imino group optionally substituted with C.sub.1 -C.sub.6 alkyl or aralkyl; ring A is aryl or heteroaryl ring, optionally substituted; R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkyl and R.sup.4 is hydrogen or R.sup.3 and R.sup.4 together represent a group of formula (IV):--(CR.sup.a R.sup.a).sub.m --C(.dbd.Y)-- (IV)(wherein R.sup.a and R.sup.a is C.sub.1 -C.sub.6 alkyl or hydrogen, up to a maximum of 3 alkyl groups, m is 1, 2, or 3, and Y is two hydrogens or oxygen); provided that when E represents a methylene group, then R.sup.3 is a C.sub.1 -C.sub.6 alkyl group or R.sup.3 and R.sup.4 together represent a group of the formula (IV).
    Type: Grant
    Filed: August 22, 1989
    Date of Patent: June 4, 1991
    Assignee: Sankyo Company Limited
    Inventors: Atsusuke Terada, Yoshio Iizuka, Kazuyuki Wachi, Kenji Fujibayashi
  • Patent number: 4673761
    Abstract: Cycloalkylidenemethylphenylacetic acid derivatives of formula (I): ##STR1## (wherein R.sup.1 represents hydrogen or alkyl and n is an integer from 1 to 3) are prepared by reacting a benzaldehyde acid compound of formula (II): ##STR2## with an enamine derivative of formula (III): ##STR3## (wherein R.sup.2 and R.sup.3 are various organic groups) and then hydrolizing the product. The use of the acid of formula (II) rather than its corresponding ester enables the reaction to be effected with a good yield and under moderate and economical reaction conditions.
    Type: Grant
    Filed: June 28, 1985
    Date of Patent: June 16, 1987
    Assignee: Sankyo Company, Limited
    Inventors: Atsusuke Terada, Kazuyuki Wachi
  • Patent number: 4161538
    Abstract: 4-(2-Oxo- or hydroxyimino-cycloalkan-1-ylmethyl)phenylacetic acid derivative and nontoxic pharmaceutically acceptable salt thereof are useful as an anti-inflammatory agent. The above 2-oxo-compound may be prepared by (a) hydrolyzing and decarboxylating 4-(1-alkoxycarbonyl-2-oxocycloalkan-1-ylmethyl)phenylacetic acid ester derivative or (b) reacting p-halomethylphenylacetic acid ester derivative with an enamine of cycloalkanone and hydrolyzing the resulting product. And further, the above 2-hydroxyimino-compound may be prepared by (c) reacting 4-(2-oxocycloalkan-1-ylmethyl)phenylacetic acid derivative (the product of process (a) or (b)) with hydroxylamine or (d) reacting a dilithium salt of cycloalkanone oxime with p-halomethyl- or p-sulfonyloxymethyl-phenylacetic acid ester derivative and hydrolyzing the resulting product.
    Type: Grant
    Filed: March 10, 1978
    Date of Patent: July 17, 1979
    Assignee: Sankyo Company Limited
    Inventors: Atsusuke Terada, Kazuyuki Wachi, Eiichi Misaka