Patent ID: 6251938
Filing Date: 2001-06-26
Classification: C07C

Abstract:
A compound having the formula: ##STR12##whereinm is from 0-4;X is O or S;Y is halogeno;R.sub.1 is hydrogen or C.sub.1-4 alkyl;R.sub.2 is hydrogen, C.sub.1-4 alkyl or optionally substituted propargyl; andR.sub.3 and R.sub.4 are each independently hydrogen, C.sub.1-8 alkyl, C.sub.6-12 aryl, C.sub.6-12 cycloalkyl or C.sub.6-12 aralkyl, R.sub.5 is hydrogen or C.sub.1-4 alkyl; and pharmaceutically acceptable salts thereof, provided that when X is O, R.sub.2 is optionally substituted propargyl.