• S.Sheik Mansoor
• P. Baskaran
• B. Bathrinarayanan
• R. Perumal

An eco-friendly simple protocol has been devised for the preparation of coumarin derivatives using chitosan sulfonic acid (CS-SO3H) as a catalyst. Solvent-free conditions were employed for the reaction of different substituted phenols with β-ketoester in CS-SO3H to produce corresponding substituted coumarin derivatives in good to excellent yields at room temperature and with reduced reaction times. The reactions are characterized by high efficiency, short reaction time, high product yield, simple experimental procedure, availability of catalyst, and environmentally-friendly reaction conditions.

Chitosan sulfonic acid; β-ketoester; coumarin; multicomponent reaction; one-pot synthesis

"Chitosan sulfonic acid as an efficient catalyst for the green synthesis of coumarin derivatives", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 10, page no.h546-h552, October-2023, Available :http://www.jetir.org/papers/JETIR2310668.pdf

"Chitosan sulfonic acid as an efficient catalyst for the green synthesis of coumarin derivatives", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 10, page no. pph546-h552, October-2023, Available at : http://www.jetir.org/papers/JETIR2310668.pdf