Eponemycin, an antibiotic with a highly potent and specific antitumor activity  against B16 melanoma cells in vivo, has been synthesized. The framework of the  western half of the molecule was built up from N-trityl-γ,  δ-didehydroleucinal and the dilithium derivative LiO-CH2C(Li)=CH2. In the  final step, a vinyl ketone was oxidized nonstereoselectively to give a mixture  of three isomers from which eponemycin was isolated in 40% yield.
                                    表鬼臼霉素是一种抗生素,具有高度强效且特异性的体内抗B16
黑色素瘤细胞活性,现已合成成功。该分子的西半部分结构由N-三苯甲基-γ, δ-二脱氢亮
氨醛和二
锂衍
生物LiO-CH₂C(Li)=CH₂构建而成。在最后一步中,
乙烯基酮非立体选择性地氧化生成三种异构体混合物,从中分离得到表鬼臼霉素,产率为40%。