Synthesis of Some 1-Aryl-4-(2-hydroxybenzoyl)-pyrazol-5-one and 1-Aryl[1]benzopyrano [2,3-c]pyrazol-4(1H)-one Derivatives from 3-Acyl-4-hydroxycoumarins
Synthesis of Some 1-Aryl-4-(2-hydroxybenzoyl)-pyrazol-5-one and 1-Aryl[1]benzopyrano [2,3-c]pyrazol-4(1H)-one Derivatives from 3-Acyl-4-hydroxycoumarins