Cerous Methanesulfonate Catalyzed Facile Synthesis of 2-Substituted-2,3-dihydro-4(1<i>h</i>)-quinazolinones by Grinding Technique
作者:Min Wang、Jingjing Gao、Zhiguo Song、Lei Wang
DOI:10.1002/jhet.963
日期:2012.9
2‐Substituted‐2,3‐dihydro‐4(1H)‐quinazolinones were synthesized in high to excellent yields through direct cyclocondensation of 2‐anthranilamide with aldehydes or ketones in the presence of a recyclable cerousmethanesulfonate by grindingtechnique under aqueous conditions.
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
AbstractCitric acid promoted synthesis of a mini‐library 2,3‐dihydroquinazolin‐4(1H)‐ones with good to excellent yields is achieved by tandem reaction of anthranilamides (or anthranilhydrazides) with aldehydes on grinding at room temperature under solvent‐free conditions. This method has notable advantages in terms of simple workup, short reaction time, cost‐effective, and environmentally benign. J. Heterocyclic Chem., (2012).