DBU-catalyzed expeditious and facile multicomponent synthesis of N-arylquinolines under microwave irradiation
作者:Satish Kumar Singh、Krishna Nand Singh
DOI:10.1007/s00706-011-0651-y
日期:2012.5
AbstractN-Arylquinoline derivatives are obtained in excellent yields by a rapid, easy, and efficient one-potmulticomponent reaction of aromatic aldehydes, 3-arylamino-5,5-dimethylcyclohex-2-enone, and active methylene compounds utilizing 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) as a catalyst in ethanol undermicrowave irradiation. Graphical abstract
N‐aryl quinoline derivatives have been prepared by sequential one‐pot reaction of dimedone, aniline, malononitrile and arylaldehydes. The reactions were performed in two different conditions, refluxing in ethanol without catalyst and heating in ethanol/water (1:1) in the presence of imidazole as an organocatalyst. Use of organocatalyst causes shorter reaction times and higher yields.