Synthesis of 3-Aroyl-4-heteroarylpyrrole Derivatives by the Van Leusen Method

The synthesis and structural diversification of N-heterocycles systems have attracted much attention because their potential applications. Three 6-aryl-3-methyl-1-phenyl-1H-pyrazolo[3,4-b]pyridine-5-carbaldehyde 4 derivatives, in reaction with acetophenones 5, via conventional Claisen–Schmidt condensation reactions, generated the respective enones. enones were used as electron-deficient olefins a “formal” [2+3] cycloaddition using p-tosylmethyl isocyanide—TosMIC 7. This protocol allows access to 3-(substituted aroyl)-4-heteroaryl pyrrole derivatives by Van Leusen method.