Total syntheses of lyngbyabellins A and B, potent cytotoxic lipopeptides from the marine cyanobacterium Lyngbya majuscula
作者:Fumiaki Yokokawa、Hirofumi Sameshima、Daichi Katagiri、Toyohiko Aoyama、Takayuki Shioiri
DOI:10.1016/s0040-4020(02)01224-3
日期:2002.11
The first total syntheses of lyngbyabellins A and B, Lyngbya majuscula derived lipopeptides, are described. The functionalized thiazole carboxylic acid units were prepared by the oxidative dehydrogenation of the corresponding thiazolidines with chemical manganese dioxide. The asymmetric synthesis of the dichlorinated β-hydroxy acid by a chiral oxazaborolidinone mediated aldol reaction. Finally, fragment
描述了Lyngbyabellins A和B,Mascrula majuscula衍生的脂肽的第一次总合成。通过用化学二氧化锰对相应的噻唑烷进行氧化脱氢来制备官能化的噻唑羧酸单元。通过手性草氮杂硼烷酮介导的羟醛反应不对称合成二氯化β-羟基酸。最后,片段缩合,随后进行大内酰胺化,得到了lyngbyabellinA。lyngbyabellinB的总合成是通过在大内酰胺化后形成敏感的噻唑啉环来完成的。