Patent number: 4725597
Abstract: Compounds of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 are independently hydrogen, alkyl of 1 to 4 carbon atoms, hydroxyl, alkoxy of 1 to 4 carbon atoms, alkanoyloxy of 1 to 4 carbon atoms, halogen, trihalomethyl, di(lower alkyl of 1 to 4 carbon atoms)amino, (alkoxy of 1 to 4 carbon atoms)carbonyl, nitro, cyano or alkanoyl of 1 to 3 carbon atoms;R.sub.7 and R.sub.8 are independently hydrogen, methyl, hydroxyl, carboxyl, (alkoxy of 1 to 4 carbon atoms)carbonyl, hydroxymethyl, phenyl, or p-chlorophenyl;R.sub.9 and R.sub.10 are independently hydrogen or methyl;j and k are independently 0, 1, 2, or 3, their sum being no more than 4;m and n are independently 0, 1, 2, or 3, their sum being no more than 4;A is --CH.sub.2 -- or --CH.sub.2 --CH.sub.2 --;R.sub.7 and R.sub.9 together are oxo, provided k is other than o;R.sub.8 and R.sub.10 together are oxo, provided m is other than o;R.sub.11 and R.sub.
Type:
Grant
Filed:
September 24, 1984
Date of Patent:
February 16, 1988
Assignee:
Boehringer Ingelheim Ltd.
Inventors:
John P. Devlin, Daniel W. McNeil, James J. Keirns, Edward L. Barsumian