Efficient synthesis of morolic acid and related triterpenes starting from betulin
作者:Pu Zhang、Jia Hao、Jun Liu、Luyong Zhang、Hongbin Sun
DOI:10.1016/j.tet.2009.03.100
日期:2009.5
Morolic acid (1) is a naturally occurring pentacyclictriterpene whose derivatives exhibit promising anti-HIV and other biological activities. An efficient synthesis of 1 has been accomplished in 11 steps with a total yield of 24% starting from betulin. Some related natural triterpenes including moradiol (4), acridocarpusic acid D (5), acridocarpusic acid E (6), and moronic aldehyde (7) have also been