作者:Parthasarathi Das、Vobbalareddy Saibaba、Chetlur Kumar、Velisoju Mahendar
DOI:10.1055/s-2008-1032028
日期:2008.2
A concise and efficient synthesis of the macrolide core of migrastatin, an antimetastatic agent, is reported. In this synthetic protocol, the key intermediate (4R,5S,6S)-6-methoxy-5-(4-methoxybenzyloxy)-2,4-dimethylocta-2,7-dien-1-ol is obtained after diastereoselective aldol condensation, Lewis acid mediated diastereoselective addition, and an exclusive Z-olefination sequence have been employed. Yamaguchi esterification of the key intermediate, followed by ring-closing metathesis produced the desired macrolide in high selectivity and good yield.
报道了一种针对迁移霉素(migrastatin)大环内酯核心的高效简洁合成方法。在该合成方案中,通过双键选择性aldol缩合、Lewis酸介导的手性选择性加成和专一的Z-型烯烃化反应序列,获得了关键中间体(4R,5S,6S)-6-甲氧基-5-(4-甲氧基苄氧基)-2,4-二甲基辛-2,7-二烯-1-醇。随后通过Yamaguchi酯化反应和环闭合复分解反应,高效且选择性良好地合成了目标大环内酯。