Sharpless Asymmetric Dihydroxylation of 5-Aryl-2-vinylfurans: Application to the Synthesis of the Spiroketal Moiety of Papulacandin D
作者:Devan Balachari、George A. O'Doherty
DOI:10.1021/ol0000253
日期:2000.3.1
Using the Sharpless catalytic asymmetric dihydroxylation reaction on 5-aryl-2-vinylfurans, diols are produced in high enantioexcess. The resulting diols can be efficiently transformed into the spiroketal ring precursor of the antifungal compound papulacandin D. Stereoselective reduction of this precursor followed by a diastereoselective dihydroxylation completes the synthesis of a mannopyranoside isomer
[分子式:见正文]使用在5-芳基-2-乙烯基呋喃上进行的Sharpless催化不对称二羟基化反应,可以高对映体过量生产二醇。所得的二醇可以有效地转化为抗真菌化合物木瓜素D的螺环环前体。该前体的立体选择性还原,然后非对映选择性的二羟基化完成了木瓜素衍生物的甘露吡喃糖苷异构体的合成。