作者:Miguel Lorca、Michio Kurosu
DOI:10.1016/s0040-4039(01)00205-2
日期:2001.3
The lipophilic side chain of the cyclic depsipeptide polyoxypeptin A (1) and B (2), strong apoptosis inducers, has been synthesised as an ester of mixed methyl ketal 18. The key step is an asymmetric anti-aldol reaction of the designed 2-(N-2-methylbenzyl-N-2,4,6-trimethylbenzyl) amino-1-phenylpropyl ester 8 by means of a combination of LDA–Cp2ZrCl2 (0.3 equiv.) for enolation and transmetallation into
脂环缩缩肽聚氧肽肽A(1)和B(2)的亲脂性侧链作为混合甲基缩酮18的酯已被合成。关键步骤是通过LDA–Cp 2 ZrCl的组合,设计的2-(N -2-甲基苄基-N -2,4,6-三甲基苄基)氨基-1-苯丙酯8的不对称抗羟醛反应。2(0.3当量)用于烯醇化和金属过渡成烯醇化锆用于醛醇缩合。通过使用非硼相关的抗醛醇缩合反应,可以从六个步骤中合成10克关键内酯68和48%的总产量。