A new synthesis of cytotoxic 3-epi-jaspine B (34.7% overall yield; 97% ee) and (+)-oxybiotin (21.2% overall yield; 97% ee) is described starting from cis-2-butene-1,4-diol. The key reactions employed in the synthesis are Sharpless asymmetric epoxidation and a novel tandem desilylation-oxa Michael addition reaction.
描述了一种从顺-2-丁烯-1,4-二醇开始合成细胞毒性3-epi-jaspine B(总产率34.7%;97%ee)和(+)-oxybiotin(总产率21.2%;97%ee)的新合成方法。合成中采用的关键反应包括Sharpless不对称环氧化反应和一种新颖的串联脱硅基氧-迈克尔加成反应。