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Chiral bifunctional organocatalysts for enantioselective synthesis of 3-substituted isoindolinones†
Rui Zhang,Hai Dong,Yan-Yan Jia,Guo-Qiang Bao,Ping-An Wang
RSC Advances Pub Date : 08/15/2023 00:00:00 , DOI:10.1039/D3RA04350A
Abstract

A series of chiral bifunctional organocatalysts were prepared and used for enantioselective synthesis of 3-substituted isoindolinones from 2-formylarylnitriles and malonates through aldol-cyclization rearrangement tandem reaction in excellent yields and enantioselectivites (up to 87% yield and 95% ee) without recrystallization. In this investigation, we found that chiral tertiary-amine catalysts with a urea group can afford 3-substituted isoindolinones both in higher yields (87% vs. 77%) and enantioselectivities (95% ee vs. 46% ee) than chiral bifunctional phase-transfer catalysts.

Graphical abstract: Chiral bifunctional organocatalysts for enantioselective synthesis of 3-substituted isoindolinones
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