Patent ID: 6384230
Filing Date: 2002-05-07
Classification: A61P,C07D,Y02P

Abstract:
A compound of formula II whereinR1 is C1-C4 alkyl, R2 is benzyl, p-methoxybenzyl (PMB), trimethyl-silyl, 2-(trimethylsilyl)ethoxymethyl (SEM), tetrahydropyranyl, methoxymethyl, benzyloxymethoxymethyl, benzoyl, or acetyl, R3 is hydrogen or C1-C4 alkyl, Y is CO2R4, CHO, CH&boxH;CH2 or CH2R5, R4 is C1-C4 alkyl or an optionally substituted benzyl group, R5 is halogen, hydroxy, p-toluenesulfonate or â€”OSO2B, and B is C1-C4 alkyl or C1-C4 perfluoroalkyl.