Multicomponent reactions of 1,3-disubstituted 5-pyrazolones and formaldehyde in environmentally benign solvent systems and their variations with more fundamental substrates

• DOI: 10.1039/b924699a
• Publication Date: 2010-04-09T08:30:21Z
• Authors: Jia-Neng Tan; Minghao Li; Yanlong Gu
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology; 01 natural sciences; 0104 chemical sciences

AbstractA series of substituted tetrahydropyrano[2,3‐c]pyrazoles (IV) and (VII) is readily obtained by three‐component reaction of pyrazolones with styrenes and paraformaldehyde under solvent‐free conditions.