Patents by Inventor Akiyoshi Kawai

Akiyoshi Kawai 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).

  • Publication number: 20020045654
    Abstract: This invention provides a compound of the formula: 1
    Type: Application
    Filed: April 24, 2001
    Publication date: April 18, 2002
    Inventors: Kazuo Ando, Tomoki Kato, Akiyoshi Kawai, Tomomi Nonomura
  • Publication number: 20020022729
    Abstract: A compound of the formula: 1
    Type: Application
    Filed: July 30, 2001
    Publication date: February 21, 2002
    Inventors: Akiyoshi Kawai, Makoto Kawai
  • Patent number: 6294558
    Abstract: This invention provides a compound of the formula: or its pharmaceutically acceptable salt thereof, wherein A is partially unsaturated or unsaturated five membered heterocyclic, or partially unsaturated or unsaturated five membered carbocyclic, wherein the 4-(sulfonyl)phenyl and the 4-substituted phenyl in the formula (I) are attached to ring atoms of Ring A, which are adjacent to each other; R1 is optionally substituted aryl or heteroaryl, with the proviso that when A is pyrazole, R1 is heteroaryl; R2 is C1-4 alkyl, halo-substituted C1-4 alkyl, C1-4 alkylamino, C1-4 dialkylamino or amino; R3, R4 and R5 are independently hydrogen, halo, C1-4 alkyl, halo-substituted C1-4 alkyl or the like; or two of R3, R4 and R5 are taken together with atoms to which they are attached and form a 4-7 membered ring; R6 and R7 are independently hydrogen, halo, C1-4 alkyl, halo-substituted C1-4 alkyl, C1-4 alkoxy, C1-4 alkylthio, C1-4 alkylamino or N,N-di C1-4 alkylamino; and m and n are independently 1, 2, 3 or
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: September 25, 2001
    Assignee: Pfizer Inc.
    Inventors: Kazuo Ando, Tomoki Kato, Akiyoshi Kawai, Tomomi Nonomura
  • Patent number: 6291520
    Abstract: Certain novel hydroxamic acid derivatives having the structure inhibit the enzyme lipoxygenase. These compounds, and the pharmaceutically acceptable salts thereof, are useful in the treatment or alleviation of inflammatory diseases, allergic conditions and cardiovascular diseases in mammals and as the active ingredient in pharmaceutical compositions for treating such conditions.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: September 18, 2001
    Assignee: Pfizer
    Inventors: Takafumi Ikeda, Akiyoshi Kawai, Takashi Mano, Yoshiyuki Okumura, Rodney William Stevens
  • Patent number: 6048880
    Abstract: A compound of the formula: ##STR1## and its pharmaceutically effective salts, wherein R.sup.1 and R.sup.2 are independently selected from the following:(a) hydrogen, halo, R.sup.5 --, C.sub.2-6 alkenyl, C.sub.2-6 alkynyl, hydroxy-R.sup.5 --, R.sup.5 --O--R.sup.5 --, or the like; (b) Ar--, Ar--R.sup.5 --, Ar--C.sub.2-6 alkenyl, Ar--C.sub.2-6 alkynyl, Ar--O--, Ar--O--R.sup.5 -- or the like; (c) R.sup.5 --C(O)--, --NO.sub.2, cyano, NH.sub.2 --C(O)--, R.sup.5 --NH--C(O)--, (R.sup.5).sub.2 --N--C(O)--, Ar--C(O)-- or the like; and (d) R.sup.5 --C(O)--NH--, Ar--C(O)--NH-- or the like; wherein Ar is optionally substituted aryl or heteroaryl such as phenyl and pyridyl; and wherein R.sup.5 is optionally halo-substituted C.sub.1-6 alkyl; R.sup.3 is selected from the following: (e) cyano, formyl, tetrazolyl, triazolyl, imidazolyl, oxazolyl, thiazolyl, R.sup.5 --C(O)--, C.sub.2-6 alkenyl-C(O)--, C.sub.2-6 alkynyl-C(O)--, R.sup.5 --C(O)--R.sup.5 --, or the like; (f) R.sup.5 --C(O)--NH--, Ar--C(O)--NH--, or the like; (g) R.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: April 11, 2000
    Assignee: Pfizer Pharamaceuticals Inc.
    Inventors: Akiyoshi Kawai, Makoto Kawai
  • Patent number: 5798383
    Abstract: The prevent invention provides a compound of formula (I): ##STR1## wherein Ar is (a) phenyl, naphthyl and biphenyl, each optionally substituted with C.sub.1-4 alkyl, C.sub.1-4 haloalkyl, C.sub.1-4 hydroxyalkyl, C.sub.1-4 alkoxy, C.sub.1-4 haloalkoxy, C.sub.2-4 alkoxyalkoxy, C.sub.1-4 alkylthio, hydroxy, halo, cyano, amino, C.sub.1-4 alkylamino, di (C.sub.2-8) alkylamino, C.sub.2-6 alkanoylamino, carboxy, C.sub.2-6 alkoxycarbonyl, or optionally substituted phenyl, phenoxy, phenylthio or phenylsulfinyl or (b) furyl, benzo?b!furyl, thienyl, benzo?b!thienyl, pyridyl or quinolyl, each optionally substituted with C.sub.1-4 alkyl, C.sub.1-4 haloalkyl, halo, C.sub.1-4 alkoxy, optionally-substituted phneyl, phenoxy or phenylthio, X is C.sub.1 -C.sub.4 alkylene, C.sub.2 -C.sub.4 alkenylene, --(CHR.sup.1).sub.m --Q.sup.1 --(CHR.sup.2).sub.n --, --O--(CHR.sup.1).sub.j --Q.sup.2 -- and --(CHR.sup.1)--O--N.dbd. in which the N.dbd. moiety is attached to the cycloalkene ring; and in which Q.sup.1 is O, S, SO, SO.sub.2, NR.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: August 25, 1998
    Assignee: Pfizer Inc.
    Inventors: Akiyoshi Kawai, Makoto Kawai, Rodney W. Stevens
  • Patent number: 5792882
    Abstract: The invention relates to compounds of the formula ##STR1## and to pharmaceutically acceptable salts thereof, wherein R.sup.1 is hydrogen, fluoro, or chloro, and R.sup.2 is hydrogen or methyl. The above compounds are lipoxygenase inhibitors. The invention also relates to pharmaceutical compositions containing the above compounds, and to methods of treating inflammatory and allergic conditions by administering the above compounds.
    Type: Grant
    Filed: May 24, 1996
    Date of Patent: August 11, 1998
    Assignee: Pfizer Inc.
    Inventors: Akiyoshi Kawai, Rodney W. Stevens
  • Patent number: 5665768
    Abstract: Certain novel heteroaryl cycloalkenyl hydroxyurea compounds having the ability to inhibit the 5-lipoxygenase enzyme and having formula (I) and the pharmaceutically acceptable salts thereof, wherein each R.sup.1, independently, is hydrogen, hydroxy, chloro, fluoro, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 haloalkyl or C.sub.1 -C.sub.4 haloalkoxy; R.sup.2 is hydrogen or C.sub.1 -C.sub.4 alkyl; R.sup.3 is hydrogen, chloro, fluoro or C.sub.1 -C.sub.4 alkyl; X is O, S, SO or SO.sub.2 ; Z is methylene or ethylene; A is divalent radical derived from furan, thiophene, pyridine, benzofuran, benzothiophene or quinoline, or one of these groups having one substituent selected from chloro, fluoro, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 haloalkyl and C.sub.1 -C.sub.4 haloalkoxy; n is 1, 2 or 3; and M is hydrogen or a pharmaceutically acceptable cation.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: September 9, 1997
    Assignee: Pfizer Inc.
    Inventors: Akiyoshi Kawai, Rodney W. Stevens
  • Patent number: 5521212
    Abstract: Compounds of the formula ##STR1## wherein A is C1 to C3 alkylene, Ar is phenyl or styryl, R is halosubstituted C1 to C3 alkyl, NHR' or ##STR2## R' is hydrogen or C2 to C8 alkytthioalkyl, n is an integer of from 1 to 4 and p is an integer of from 2 to 5, with the proviso that when R' is hydrogen then Ar is styryl, and the pharmaceutically acceptable salts thereof, inhibit the enzyme lipoxygenase and are useful in treating allergy and inflammatory and cardiovascular conditions for which the action of lipoxygenase has been implicated. These compounds form the active ingredient in pharmaceutical compositions for treating such conditions.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: May 28, 1996
    Assignee: Pfizer Inc.
    Inventors: Takafumi Ikeda, Akiyoshi Kawai, Takashi Mano, Yoshiyuki Okumura, Rodney W. Stevens
  • Patent number: 5134139
    Abstract: Novel 1,5-benzothiazepine derivatives of the formula: ##STR1## wherein X is hydrogen atom, a halogen atom or a lower alkyl group; R.sup.1 is a lower alkyl group or a lower alkoxy group; R.sup.2 is hydrogen atom, a lower alkyl group, a substituted or unsubstituted phenyl group, a substituted or unsubstituted phenyl-lower alkyl grup or a diphenyl-lower alkyl group; R.sup.3 is a lower alkyl group or a substituted or unsubstituted phenyl-lower alkyl group, Q is single bond, or an alkylene or lower alkenylene group which may optionally be substituted by a lower alkoxy group or oxo group; R.sup.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: July 28, 1992
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Akiyoshi Kawai, Hirozumi Inoue, Hiroshi Narita, Taku Nagao
  • Patent number: 4371533
    Abstract: This invention relates to 4,5-deoxymaytansinoid compounds represented by the formula ##STR1## wherein X is a hydrogen atom or an alkyl or acyl group, Y is a hydrogen or chlorine atom, and R is a hydrogen atom or a carboxylic acid-derived acyl group, and methods of producing the same. The compounds are useful as antitumor, antiprotozoal and antifungal agents.
    Type: Grant
    Filed: September 29, 1981
    Date of Patent: February 1, 1983
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Hiroshi Akimoto, Akiyoshi Kawai