作者:Yusuke Kurashina、Ayako Miura、Masaru Enomoto、Shigefumi Kuwahara
DOI:10.1016/j.tet.2011.01.005
日期:2011.3
A new stereoselective total synthesis of malyngic acid has been achieved from a known oxazolidinone derivative via eight steps involving the Evans asymmetric alkylation as the chirality-inducing step and chelation-controlled Zn(BH4)2 reduction of an α-hydroxy ketone intermediate for the installation of the 12,13-anti stereochemistry. Fulgidic acid, the C12-epimer of malyngic acid, has also been synthesized
通过八个步骤,从已知的恶唑烷酮衍生物中获得了新的立体选择性全合成麦芽酸,该八个步骤涉及作为手性诱导步骤的Evans不对称烷基化和α-羟基酮中间体的螯合控制的Zn(BH 4)2还原控制。安装12,13-抗立体化学。通过使用α-烷氧基酮中间体的顺-选择性K-选择性还原,还从相同的起始原料以八个步骤合成了次甲基酸,即麦芽酸的C 12-差向异构体。