Asymmetric synthesis of (–)-leiocarpin A via (–)-(<i>S</i>)-goniothalamin employing Julia–Kocienski olefination
作者:Suresh Babu Meruva、Raghavendra Rao K.、Aaseef Mohammed、Vilas H. Dahanukar、U. K. Syam Kumar、P. K. Dubey
DOI:10.1080/00397911.2015.1128546
日期:2016.1.17
ABSTRACT A concise and enantioselective syntheses of antileukemic natural products such as (–)-(S)-goniothalamin and (–)-leiocarpin A has been accomplished in excellent yields. By employing reported conditions on suitable substrates via Julia–Kocienski olefination, intramolecular lactonization, and subsequently dehydroxylative olefination, (–)-(S)-goniothalamin was synthesized. Then Sharpless asymmetric
摘要 抗白血病天然产物如 (-)-(S)-goniothalamin 和 (-)-leiocarpin A 的简洁和对映选择性合成已经以优异的产率完成。通过 Julia-Kocienski 烯化、分子内内酯化和随后的脱羟基烯化,在合适的底物上采用报道的条件,合成了 (-)-(S)-goniothalamin。然后 Sharpless 不对称二羟基化 - (-)-(S)-goniothalamin 上的分子内迈克尔加成提供 (-)-leiocarpin A。图形摘要