A facile synthesis of (6 S ,1′ S )-(+)-hernandulcin and (6 S ,1′ R )-(+)-epihernandulcin
作者:Jung Hun Kim、Hyun Jin Lim、Seung Hoon Cheon
DOI:10.1016/s0040-4020(03)01168-2
日期:2003.9
A facile total synthesis of (+)-hernandulcin (1) was accomplished from (−)-isopulegol in 6 steps with 15% overall yield. Epoxidation of (−)-isopulegol with m-chloroperbenzoic acid followed by opening of the epoxide 3a with prenyl Grignard afforded the tertiary alcohol 4a with correct C-6 and C-1′ stereochemistry as a major product. Oxidation of the secondary alcohol in compound 4a to the ketone 5a