Highly Chemoselective Multicomponent Biginelli-Type Condensations of Cycloalkanones, Urea or Thiourea and Aldehydes
作者:Yu-lin Zhu、Shen-lin Huang、Yuan-jiang Pan
DOI:10.1002/ejoc.200400845
日期:2005.6
The classical Biginelli reaction is considerably extended by use of cycloalkanones instead of 1,3-dicarbonyl compounds. Use of TMSCl as a Lewis acid allowed one-pot chemoselective multicomponent Biginelli reactions between cycloalkanones, urea or thiourea, and aldehydes. Under similar reaction conditions, thiourea exhibited different behavior to urea, and aliphaticaldehydes showed lower reactivity
Poly(ethylene)glycol/AlCl<sub>3</sub> as a new and efficient system for multicomponent Biginelli-type synthesis of pyrimidinone derivatives
作者:Ali Amoozadeh、Salman Rahmani、Firouzeh Nemati
DOI:10.1515/hc-2012-0157
日期:2013.3.1
Abstract Biginelli condensation of aldehydes, cyclopentanone and urea or thiourea in poly(ethylene)glycol 400, at 45°C in the presence of aluminumchloride as a highly efficient catalyst has been developed. The reaction is very fast, clean and environmentally benign for the synthesis of a vast variety of pyrimidinone derivatives.