Niacin as a Potent Organocatalyst towards the Synthesis of Quinazolines Using Nitriles as C-N Source
作者:Raghuram Gujjarappa、Nagaraju Vodnala、Velma Ganga Reddy、Chandi C. Malakar
DOI:10.1002/ejoc.201901651
日期:2020.2.21
An organocatalyzed protocol has been described for the comprehensive synthesis of 2‐substituted quinazolines usingnitriles as C–N source. The developed reaction conditions are suitable for a wide range of substrates providing the desired products in excellent yields.
Copper-Catalyzed Sequential N-Arylation and Aerobic Oxidation: Synthesis of Quinazoline Derivatives
作者:Hua Fu、Changmei Cheng、Qing Liu、Yufen Zhao
DOI:10.1055/s-0033-1339800
日期:——
novel and efficient copper-catalyzedcascade method for the synthesis of quinazolinederivatives has been developed. The protocol uses readily available substituted (2-bromophenyl)methylamines and amidine hydrochlorides as the starting materials, inexpensive CuBr as the catalyst, and economical and environment friendly air as the oxidant, and the corresponding quinazolinederivatives were obtained in
Copper-Catalyzed Synthesis of Quinazolines in Water Starting from o-Bromobenzylbromides and Benzamidines
作者:Chandi C. Malakar、Alevtina Baskakova、Jürgen Conrad、Uwe Beifuss
DOI:10.1002/chem.201200583
日期:2012.7.16
Water makes it possible: The Cu2O‐catalyzed reaction between easily available o‐bromobenzylbromides and benzamidines by using Cs2CO3 as the base and N,N′‐dimethylethylenediamine (DMEDA) as the additive in water as the solvent gives access to substituted quinazolines in a single step with yields ranging from 57 to 85 % (see scheme).
水使成为可能:通过使用Cs 2 CO 3作为碱和N,N'-二甲基乙二胺(DMEDA)作为在水中的添加剂作为溶剂,Cu 2 O催化易得的邻溴代溴化苄与苄am之间的反应一步即可取代取代的喹唑啉,产率为57%至85%(请参阅方案)。