Benzo[1,5]thiazepine: Synthesis, Reactions, Spectroscopy, and Applications

Scheme 51

Multicomponent reaction (MCR) of the intermediates 4-benzylidene-1,3-disubstituted-1H-pyrazol-5(4H)-ones 255 with o-aminothiophenol under microwave irradiation using montmorillonite K10 and through a neat reaction.