Patent ID: 6472529
Filing Date: 2002-10-29
Classification: A61P,C07D

Abstract:
A compound of the formula: wherein P3 and P4 are independently selected from hydrogen and an N-protecting group; R1 and R2 ae independently selected from the group consisting of loweralkyl, cycloalkylalkyl and ary lalkyl; and R3 is loweralkyl, hydroxyalkyl or cycloalkylalkyl; and R5 is wherein n is 1, 2 or 3, X is O, S, or NH and Y is â€”CH2â€”, â€”Oâ€”, â€”Sâ€” or â€”N(R6)â€” wherein R6 is hydrogen, loweralkyl, cycloalkyl, cycloalkylakyl, aryl or arylalkyl; or a salt thereof.