Organocatalytic Enantioselective Michael–Acetalization–Reduction–Nef Reaction for a One-Pot Entry to the Functionalized Aflatoxin System. Total Synthesis of (−)- Dihydroaflatoxin D<sub>2</sub> and (−)- and (+)-Microminutinin
作者:Wei-Lun Huang、Arun Raja、Bor-Cherng Hong、Gene-Hsiang Lee
DOI:10.1021/acs.orglett.7b01473
日期:2017.7.7
enantioselective synthesis of the aflatoxin system with multiple stereocenters via a sequence of organocatalytic Michael–acetalization–reduction–Nef reactions that proceed with high enantioselectivities (90–99% ee). The one-pot reaction sequence provides a facile entry to the aflatoxin system, including dihydroaflatoxin D2, which includes a formal total synthesis of aflatoxin B2. The first total synthesis of (−)-
已经开发了一种有效的方法,可以通过一系列以高对映选择性(90-99%ee)进行的有机催化迈克尔-缩醛化-还原-Nef反应对具有多个立体中心的黄曲霉毒素系统进行对映选择性合成。一锅法反应序列为黄曲霉毒素系统(包括二氢黄曲霉毒素D 2)提供了便捷的入口,该系统包括黄曲霉毒素B 2的正式全合成。通过该方案还实现了(-)-和(+)-微量Minutinin的第一个全合成。