An effective green one-pot synthesis of some novel 5-(thiophene-2-carbonyl)-6-(trifluoromethyl)pyrano[2,3-c]pyrazoles and 6-(thiophene-2-carbonyl)-7-(trifluoromethyl)pyrano[2,3-d]pyrimidines bearing chromone ring as anticancer agents

An effective green one-pot and catalyst-free synthesis of a series of novel 5-(thiophene-2-carbonyl)-6-(trifluoromethyl)pyrano[2,3-c]pyrazoles and 6-(thiophene-2-carbonyl)-7-(trifluoromethyl)pyrano[2,3-d]pyrimidines bearing chromone ring was achieved. The method depended on a one-pot three-component reaction of readily available starting materials 4-oxo-4H-chromene-3-carboxaldehyde, 2-thenoyltrifluoroacetone, and cyclic active methylene...