Eco-friendly reactions in PEG-400: a highly efficient and green approach for stereoselective access to multisubstituted 3,4-dihydro-2(1<i>H</i>)-quinazolines using 2-aminobenzylamines
作者:Nutan Sharma、Pankaj Sharma、Sunita Bhagat
DOI:10.1039/c7ra13487h
日期:——
An efficient and stereoselective synthesis of novel 3,4-dihydro-2(1H)-quinazolines has been developed through cyclization reactions of 2-aminobenzylamines with α-oxoketene dithioacetals using PEG-400 as an inexpensive, easy to handle, non-toxic and recyclable reaction medium. The developed protocol is operationally simple and tolerates various substrates having different functionalities. This protocol
通过 2-氨基苄胺与 α-氧代烯酮二硫缩醛的环化反应,使用 PEG-400 作为一种廉价、易于处理、无毒的化合物,开发了新型 3,4-二氢-2( 1 H )-喹唑啉的高效立体选择性合成方法。和可回收的反应介质。所开发的协议操作简单,并且可以容忍具有不同功能的各种基材。该方案具有多种属性,例如优异的产率、无需后处理、绿色反应条件以及对环境无害。这种新策略的吸引人的特点是,所有报道的最终化合物都被分离为单一(E)-立体异构形式,这已通过1 HNMR 和 X 射线晶体学研究得到证实。