Development of a new cascade reaction for convergent synthesis of pyrazolo[1,5-a]quinoline derivatives under transition-metal-free conditions

A novel method for the synthesis of pyrazolo[1,5-a]quinolines under the transition-metal-free conditions has been developed. This method involves a novel combination of aromatic nucleophilic substitution and Knoevenagel condensation reactions to give pyrazolo[1,5-a]quinolines.