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。