MOHAMADPOUR, F.; LASHKARI, M. Three-component reaction of β-keto esters, aromatic aldehydes and urea/thiourea promoted by caffeine: A green and natural, biodegradable catalyst for eco-safe Biginelli synthesis of 3,4-dihydropyrimidin-2-(1H)-ones/tiones derivatives under solvent-free conditions. Journal of the Serbian Chemical Society, Belgrade, Serbia, v. 83, n. 6, p. 673–684, 2018. DOI: 10.2298/JSC170712041M. Disponível em: https://shd-pub.org.rs/index.php/JSCS/article/view/5499. Acesso em: 29 apr. 2024.