Highly Enantioselective Synthesis of 2,3-Dihydroquinazolinones through Intramolecular Amidation of Imines
作者:Muthuraj Prakash、Venkitasamy Kesavan
DOI:10.1021/ol300518m
日期:2012.4.6
Enantioselective synthesis of 2,3-dihydroquinazolinones (DHOZs) was accomplished using readily available Sc(III)-inda-pybox as the catalyst. This is the first report on the metal catalyzed asymmetric intramolecular amidation of imines to synthesize DHQs.
Investigation of the Enantioselective Synthesis of 2,3-Dihydroquinazolinones Using Sc(III)-inda-pybox
Derivatives of 2,3-dihydroquinazolinones (2,3-DHQZs) are prized for their prevalent pharmaceutical applications. Although there are potential applications, methods available for the enantioselective synthesis of these valuable compounds are scarce, since the chiral aminal center is prone to racemization. We have overcome the difficulties in the catalytic enantioselective synthesis of 2,3-DHQZs using Sc(III)-inda-pybox as a catalyst, in a process with a broad substrate scope.
Confinement‐Driven Enantioselectivity in 3D Porous Chiral Covalent Organic Frameworks
作者:Bang Hou、Shi Yang、Kuiwei Yang、Xing Han、Xianhui Tang、Yan Liu、Jianwen Jiang、Yong Cui
DOI:10.1002/anie.202013926
日期:2021.3.8
3D covalent organic frameworks (COFs) with well‐defined porous channels are shown to be capable of inducing chiral molecular catalysts from non‐enantioselective to highly enantioselective in catalyzing organic transformations. By condensations of a tetrahedral tetraamine and two linear dialdehydes derived from enantiopure 1,1′‐binaphthol (BINOL), two chiral 3D COFs with a 9‐fold or 11‐fold interpenetrated