Green Synthesis of Pyrazol‑chromeno[2,3‑d]pyrimidinones Using SBA-Pr-SO3H as an Efficient Nanocatalyst
نویسندگان
1 Department of Chemistry, Alzahra University, P.O. Box 1993893973 Tehran, I.R. IRAN
2 School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455 Tehran, I.R. IRAN
3 Department of Chemistry, Alzahra University, P.O. Box 1993893973 Tehran, I.R. IRAN
4 Department of Chemistry, Alzahra University, P.O. Box 1993893973 Tehran, I.R. IRAN
5 Research Institute of Petroleum, Shahid Beheshti University Branch, Academic Center for Education, Culture & Research, Tehran, I.R. IRAN
doi
10.30492/ijcce.2017.26017چکیده
Hexagonal mesoporous silica (SBA-15) was prepared and then functionalized by(3-mercaptopropyl)trimethoxysilane. The obtained 3-mercaptopropyl functionalized SBA-15 (SBA-Pr-SH) was then oxidized using H2O2 in methanol under an acidic condition to give sulfonic acid functionalized mesoporous silica (SBA-Pr-SO3H). The latter was characterized using different techniques (including TGA, BET, BJH, CHN, SEM, and TEM) and then used as a catalyst in organic synthesis. In the next step, SBA-Pr-SO3H catalyzed the three-component reaction of pyrazolone, salicylaldehydes, and barbituric acid in water under reflux condition. Through this procedure various pyrazolchromeno[2,3-d]pyrimidinone derivatives were obtained. The reaction conditions were completely green due to the use of water as a solvent and the presence of an environmentally benign catalyst.
