Synthesis of Novel 1-<i>H</i>-Pyrazole-4-carboxylic Acid Esters by Conventional and Microwave Assisted Vilsmeier Cyclization of Hydrazones
作者:Radhakrishnan Sridhar、Paramasivan T. Perumal
DOI:10.1081/scc-120018766
日期:2003.1.5
A convenient method for the synthesis of 1H-pyrazole-4-carboxylic acid esters is described. A comparison between the conventional and microwave assisted Vilsmeier reaction is carried out.
An efficient synthesis of 1-<i>H</i>-pyrazole-4-carboxylic acid esters with vilsmeier reagent under neat conditions
作者:R. Sridhar、G. Sivaprasad、P. T. Perumal
DOI:10.1002/jhet.5570410316
日期:2004.5
A convenient, solvent-free Vilsmeierreagent is experimented underneat condition (both thermal and microwave conditions). An efficient method for the synthesis of various substituted 1H-pyrazole-4-carboxylic acidesters is reported.