The synthesis of the anti-malarial natural product polysphorin and analogues using polymer-supported reagents and scavengers
作者:Ai-Lan Lee、Steven V. Ley
DOI:10.1039/b308761a
日期:——
A general asymmetric route to both enantiomers of polysphorin has been developed. The route utilizes polymer-supported reagents, catalysts and scavengers to minimise the need for aqueous work-up and chromatography. This includes application of a method to scavenge 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and a “catch-and-release” procedure to extract the resultant diol following Sharpless asymmetric dihydroxylation. A novel enzymatic selective protection and investigations of a new asymmetric dihydroxylation using microencapsulated osmium tetroxide were also investigated during the course of this study.
已经开发出一种通用的非对称路线来合成聚硫磷素的两种对映异构体。该路线利用聚合物支持的试剂、催化剂和清除剂,以最小化对水洗和色谱的需求。这包括应用一种方法来清除2,3-二氯-5,6-二氰基-1,4-苯醌(DDQ),以及一种“捕获-释放”程序,用于在夏普莱斯不对称双羟基化反应后提取所得的双醇。此外,还研究了一种新型酶促选择性保护方法,并在研究过程中探讨了使用微封装四氧化锇的新型不对称双羟基化反应。