Patent number: 5393753
Abstract: Compounds of the formula ##STR1## wherein R.sup.1 is H, C.sub.1 -C.sub.7 alkyl, C.sub.3 -C.sub.7 cycloalkyl, CF.sub.3, aryl, substituted aryl, heteroaryl, -O-C.sub.1 -C.sub.7 alkyl, or -O-C.sub.3 -C.sub.7 cycloalkyl; R.sup.2 and R.sup.3 are each independently H, C.sub.1 -C.sub.7 alkyl, C.sub.3 -C.sub.7 cycloalkyl, CF.sub.3, NO.sub.2, halogen, OR.sup.7, NR.sup.8 R.sup.9 or S(O).sub.m R.sup.10, wherein m is 0, 1 or 2; R.sup.4 is H, C.sub.1 -C.sub.7 alkyl, arylmethyl, or substituted arylmethyl; R.sup.5 and R.sup.6 are each independently H, C.sub.1 -C.sub.7 alkyl, C.sub.3 -C.sub.7 cycloalkyl, aryl, substituted aryl, heteroaryl, arylmethyl, substituted arylmethyl, or taken together constitute a chain of (CH.sub.2).sub.k groups, wherein k is 3, 4, or 5; R.sup.7, R.sup.8 and R.sup.9 are each independently H, C.sub.1 -C.sub.7 alkyl, -C(.dbd.O)-(C.sub.1 -C.sub.7 alkyl), -C(.dbd.O)-aryl, or -(C.dbd.O)heteroaryl; R.sup.10 is C.sub.1 -C.sub.7 alkyl, C.sub.3 -C.sub.
Type:
Grant
Filed:
April 6, 1993
Date of Patent:
February 28, 1995
Assignee:
Schering Corporation
Inventor:
Richard J. Friary