Total synthesis of Z-isomer of phomolide B

We have achieved the synthesis of Z-isomer of phomolide B during our investigation toward the effect of protecting group on the outcome of ring-closing metathesis reaction. The other key reactions involved are cis-selective partial hydrogenation, Sharpless asymmetric epoxidation, Yamaguchi esterification, and following 12 longest linear sequence with 18.5% overall yield starting from a known intermediate 20.