An unexpected multi-component reaction to synthesis of 3-(5-amino-3-methyl-1H-pyrazol-4-yl)-3-arylpropanoic acids in ionic liquid
作者:Zhiyong Xiao、Min Lei、Lihong Hu
DOI:10.1016/j.tetlet.2011.10.099
日期:2011.12
A new, one-pot, four-component condensation of 3-methyl-1H-pyrazol-5(4H)-one, ammonium acetate, aromatic aldehydes, and meldrum’s acid in [bmim]BF4 as solvent is described for the synthesis of 3-(5-amino-3-methyl-1H-pyrazol-4-yl)-3-arylpropanoic acid derivatives. This methodology resulting in excellent isolated yields in short reaction time is characterized by simple work up procedure and little environmental