Enantioselective Photocycloaddition Mediated by Chiral Brønsted Acids: Asymmetric Synthesis of the Rocaglamides
作者:Baudouin Gerard、Sheharbano Sangji、Daniel J. O'Leary、John A. Porco
DOI:10.1021/ja062621j
日期:2006.6.1
Enantioselective syntheses of methyl rocaglate and the related natural products rocaglamide and rocaglaol are outlined. The approach involves enantioselective [3 + 2] photocycloaddition promoted by chiral Brønsted acids (TADDOLs) to afford an aglain precursor followed by a ketol shift/reduction sequence to the rocaglate core.
罗卡格酸甲酯和相关天然产物罗卡格莱胺和罗卡格洛尔的对映选择性合成概述。该方法涉及由手性布朗斯台德酸 (TADDOL) 促进的对映选择性 [3 + 2] 光环加成反应,以提供 aglain 前体,然后是酮醇转移/还原序列到 rocaglate 核心。