Asymmetric Brønsted Acid Catalysis: Catalytic Enantioselective Synthesis of Highly Biologically Active Dihydroquinazolinones
作者:Magnus Rueping、Andrey P. Antonchick、Erli Sugiono、Konstantin Grenader
DOI:10.1002/anie.200804770
日期:2009.1.19
Surprisingly straightforward: A metal‐free, highly enantioselectiveBrønsted acid catalyzed condensation/addition reaction has been developed for the construction of 2,3‐dihydroquinazolinones starting from 2‐aminobenzamide and aldehydes (see scheme). This efficient approach provides 2,3‐dihydroquinazolinones with a strong preference for the S enantiomers, which have higher biological activities than
Boosting Enantioselectivity of Chiral Organocatalysts with Ultrathin Two-Dimensional Metal–Organic Framework Nanosheets
作者:Chunxia Tan、Kuiwei Yang、Jinqiao Dong、Yuhao Liu、Yan Liu、Jianwen Jiang、Yong Cui
DOI:10.1021/jacs.9b07633
日期:2019.11.6
surfaces of the flexible nanosheets. Moreover, the MOF crystals and nanosheets exhibit highly sensitive fluorescent enhancement in the presence of chiral amino alcohols with enantioselectivity factors being respectively increased up to 1.4 and 2.3 times of the values of the diols, allowing them to be utilized in chiral sensing. Therefore, the observed enantioselectivities increase in the order organocatalyst
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.
Regulation of Chiral Phosphoric Acid Catalyzed Asymmetric Reaction through Crown Ether Based Host–Guest Chemistry
作者:Jiadong Tang、Can Chen、Tao Hong、Zibin Zhang、Chunsong Xie、Shijun Li
DOI:10.1021/acs.orglett.2c03091
日期:2022.11.4
in-depth intersection of supramolecular chemistry and asymmetric catalysis due to its unique advantages in building chiral catalyst libraries and regulating performance of catalysts. Herein, we combine crown ether based host–guest chemistry with chiral phosphoricacidmediated asymmetric catalysis to actualize the supramolecular regulation of catalytic asymmetric two-component tandem acetalization