Synthesis of novel 4-pyrazolyl-2-oxo-1,2,3,4-tetrahydropyrimidines promoted by phosphotungstic acid
作者:Ganesabaskaran Sivaprasad、Paramasivan T. Peramal
DOI:10.1002/jhet.5570420518
日期:2005.7
Phosphotungsticacid, a keggin's type heteropoly acid catatalysed Biginelli reaction was carried out using pyrazole aldehyde, ethyl acetoacetate and urea to synthesisnovel 4-pyrazolyl -2-oxo-1,2,3,4-tetrahydropy- rimidines.