Asymmetric Synthesis of Quaternary Centers. Total Synthesis of (−)-Malyngolide
作者:Barry M. Trost、Weiping Tang、Jörg L. Schulte
DOI:10.1021/ol006599p
日期:2000.12.1
[structure] The deracemization of 3-nonyl-3,4-epoxybut-1-ene with Pd(0) in the presence of chiral ligands using p-methoxybenzyl alcohol as a nucleophile proceeds regio- and enantioselectively to form the monoprotected vinylglycidol in 99% ee. This chiral building block was converted in seven steps to (-)-malyngolide, an antibiotic showing significant activity against Mycobacterium smegmatis and Streptococcus
[结构]使用对甲氧基苄醇作为亲核试剂,在手性配体存在下,用Pd(0)对3-壬基-3,4-环氧丁-1-烯进行脱环反应,在99位区域和对映体选择性形成单保护的乙烯基缩水甘油%ee。该手性结构单元在七个步骤中转化为(-)-麦芽糖内酯,这是一种对耻垢分枝杆菌和化脓性链球菌具有显着活性的抗生素。一个有趣的方面涉及通过远端羟基控制烯醇盐的质子化的非对映选择性。