作者:Frederick R. Kinder,、Sompong Wattanasin、Richard W. Versace、Kenneth W. Bair、John Bontempo、Michael A. Green、Yansong J. Lu、H. Rao Marepalli、Penny E. Phillips、Didier Roche、Long D. Tran、RunMing Wang、Liladhar Waykole、David D. Xu、Sonya Zabludoff
DOI:10.1021/jo0017133
日期:2001.3.1
Total syntheses of the cytotoxic marine natural products bengamides B and E are described. Both bengamides are prepared via amide coupling of a protected polyhydroxylated lactone intermediate 9 with a suitably substituted aminocaprolactam intermediate. Lactone 9 is prepared in five steps from commercially available alpha-D-glucoheptonic gamma-lactone. The key reactions are a selective deprotection
描述了细胞毒性海洋天然产物苯甲酰胺B和E的总合成。通过保护的多羟基化内酯中间体9与适当取代的氨基己内酰胺中间体的酰胺偶联制备两种苯甲酰胺。内酯9是由市售的α-D-葡庚酮γ-内酯分五个步骤制备的。关键反应是在1,3-丙酮化物的存在下1,2-丙酮化物的选择性脱保护以及使用宝石重铬试剂对不稳定醛的(E)选择性烯化。苯甲酰胺B内酰胺中间体10由市售的(5R)-5-羟基-L-赖氨酸(12)以七个步骤制备。使用Mitsunobu反应确定在γ-OH内酰胺位置上的所需S构型。