Catalytic Enantioselective Synthesis of Chiral Phthalides by Efficient Reductive Cyclization of 2-Acylarylcarboxylates under Aqueous Transfer Hydrogenation Conditions
作者:Bo Zhang、Ming-Hua Xu、Guo-Qiang Lin
DOI:10.1021/ol901674k
日期:2009.10.15
A new diamine ligand for asymmetric transfer hydrogenation (ATH) was discovered. The reductive cyclization of 2-acylarylcarboxylates was found to proceed highly stereoselectively by the new Ru complex-catalyzed ATH and subsequent in situ lactonization under aqueous conditions. It enables efficient access to a wide variety of 3-substituted phthalides in enantiomerically pure form.
发现了一种新的用于不对称转移氢化(ATH)的二胺配体。发现2-酰基芳基羧酸盐的还原环化通过新的Ru络合物催化的ATH以及随后在水性条件下的原位内酯化而高度立体选择性地进行。它可以有效地获得对映体纯净形式的各种3-取代的邻苯二甲酸酯。