Regioselective synthesis of fused pyrazolo[1,5-a]pyrimidines by reaction of 5-amino-1H-pyrazoles and β-dicarbonyl compounds containing five-membered rings
Keywords: 5-Amino-1H-pyrazoles; 2-Aacetylcyclopentanone; 2-Ethoxycarbonylcyclopentanone; 2-Acetylbutyrolactone; Pyrazolo[1,5-a]pyrimidine;