Synthesis and structure elucidation of thiopyrano[2,3-d]thiazole-6-carbonitriles as adducts of Michael reaction

•New thiopyrano[2,3-d]thiazole-6-carbonitriles.•The structures of synthesized compounds were characterized by spectral data.•X-ray diffraction analysis is presented. A series of thiopyrano[2,3-d]thiazole derivatives via Michael reaction of malononitrile and 5-arylideneisorhodanine were synthesized. The further acid or alkaline hydrolysis of obtained thiopyrano[2,3-d]thiazole-6-carbonitrile led to starting 5-arylideneisorhodanine. The structures of newly synthesized compounds were established by spectral data and a single-crystal X-ray diffraction analysis. [Display omitted]