ACYLATED BETULIN AND DIHYDROBETULIN DERIVATIVES, PREPARATIONTHEREOF AND USE THEREOF

摘要

Betulin and dihydrobetulin acyl derivatives according to the present invention have been found to have potent anti-HIV activity. The compounds of the present invention have formulae (I) or pharmaceutically acceptable salts thereof; wherein R1 is a C2-C20 substituted or unsubstituted carboxyacyl, R2 is a C2-C20 substituted or unsubstituted carboxyacyl; and R3 is hydrogen, halogen, amino, optionally substituted mono-- or di-alkylamino, or -OR4, where R4 is hydrogen, C1-4 alkanoyl, benzoyl, or C2-C20 substituted or unsubstituted carboxyacyl; wherein the dashed line represents an optional double bond between C20 and C29.