Sunil Gaikwad - Department of Chemistry, Dr. D. Y. Patil ACS Womens College, Pimpri, Pune-۴۱۱۰۱۴; Savitribai Phule Pune University, Pune, India
Murali Venkata Basavanag Unnamatla - bCentro Conjunto de Investigación en Química Sustentable UAEM-UNAM. Carretera Toluca-Atlacomulco Km ۱۴.۵, Toluca, Estado de México, ۵۰۲۰۰, México. Universidad Autónoma del Estado de México bFacultad

The one-pot multicomponent efficient and easily operational protocol has been developed for the synthesis of tetrahydropyrano[۲,۳-c]pyrazole-۵-carbonitrile derivatives. The methods work via the multicomponent reaction between ۵-methyl-۲-phenyl-۲,۴-dihydro-۳H-pyrazol-۳-one, aldehyde, and malononitrile catalyzed by the silica-supported dodeca tungstophosphoric acid (DTP/SiO۲) catalyst. The protocol is practically green, milder reaction conditions, higher yield, with short reaction times and recyclability of the catalyst

DTP/SiO۲, Greener solvent, one-pot multicomponant, carbazole-۳-carbonitrile