Patent number: 4560691
Abstract: 1-R-5-Ar-1,6-naphthyridin-2(1H)-ones (I) or salts thereof, where R is hydrogen or methyl, and Ar is phenyl or phenyl substituted by methyl, ethyl, methoxy, ethoxy, hydroxy, amino, acetylamino, methanesulfonylamino, bromo, chloro, fluoro, cyano or carbamyl are useful as cardiotonic agents and corresponding compounds where Ar is nitrophenyl are useful as intermediates. Also shown as intermediates, are 5-(Ar--CO)-6-[2-(di-lower-alkylamino)-ethenyl]-2(1H)-pyridinones (II) or salts thereof, where Ar is phenyl or phenyl substituted by methyl, ethyl, methoxy, ethoxy, bromo, chloro, fluoro, cyano or nitro and 5-(Ar--CO)-6-methyl-2(1H)-pyridinones (III) where Ar is phenyl or phenyl substituted by methyl, ethyl, methoxy, ethoxy, bromo, chloro, fluoro, hydroxy, cyano or nitro; said compounds (III) where Ar is phenyl or hydroxyphenyl also are useful as cardiotonic agents. Processes for preparing the compounds of formulas I, II and III are shown.
Type:
Grant
Filed:
July 13, 1984
Date of Patent:
December 24, 1985
Assignee:
Sterling Drug Inc.
Inventors:
George Y. Lesher, Baldev Singh