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Carbostyril derivatives and pharmaceutical composition containing the same

  • US 4,455,422 A
  • Filed: 04/07/1982
  • Issued: 06/19/1984
  • Est. Priority Date: 03/06/1980
  • Status: Expired due to Fees
First Claim
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1. A carbostyril derivative or salt thereof represented by the general formula (1), ##STR54## wherein R1 is a hydrogen atom, a lower alkyl group, a phenyl-lower alkyl group, a lower alkenyl group or a lower alkynyl group;

  • R2 is a hydrogen atom or a lower alkyl group;

    B is a lower alkylene group;

    l is 0 or 1;

    R3 is an unsubstituted or a substituted-phenyl group having 1 to 3 substituents, on the phenyl ring, selected from the group consisting of a halogen atom, a lower alkyl group, a lower alkoxy group, a lower alkoxy-carbonyl group, a carboxy group, a lower alkylthio group, a lower alkanoyl group, a hydroxy group, a nitro group, an amino group and a cyano group;

    or R3 is a substituted-phenyl group having a lower alkylenedioxy group as the substituent on the phenyl ring, a phenyl-lower alkyl group or 1,2,3,4-tetrahydronaphthyl group;

    the carbon-carbon bond between 3- and 4-positions in the carbostyril skeleton is a single or double bond.

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