First Total Synthesis of the Potent Anticancer Natural Product Dideoxypetrosynol A: Preparation of the “Skipped” (<i>Z</i>)-Enediyne Moiety by Oxidative Coupling of Homopropargylphosphonium Ylide
作者:Benjamin W. Gung、Ann O. Omollo
DOI:10.1002/ejoc.200800593
日期:2008.10
Dideoxypetrosynol A is a C30 polyacetylenic alcohol with C2 symmetry. The first total synthesis of both enantiomers of the potent anti-cancer natural product (+)- and (–)-dideoxypetrosynol A is reported. The key step is an oxidative coupling of a homopropargylphosphonium ylide to prepare the “skipped” (Z)-enediyne moiety. The natural dideoxypetrosynol A was isolated as a racemic mixture as shown in structure 1
Dideoxypetrosynol A 是一种 C30 聚炔醇,具有 C2 对称性。报告了有效抗癌天然产物 (+)- 和 (-)-dideoxypetrosynol A 的两种对映异构体的首次全合成。关键步骤是高炔丙基鏻叶立德的氧化偶联以制备“跳过的”(Z)-烯二炔部分。天然双脱氧石油炔醇 A 作为外消旋混合物被分离出来,如结构 1 所示。使用 Burgess 的酶促拆分程序和假单胞菌 AK 脂肪酶,确定 (+)- 和 (-)- 对映异构体的手性中心的绝对构型。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)