ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Formation of dioxospiroindene[1,3]thiazine and thioxoindeno[2,1-d]imidazolone derivatives from alkenylidene-hydrazinecarbothioamides

Alaa A. Hassan, Ahmed M. Nour El-Din, Fathy F. Abdel-Latif, Sara M. Mostafa, and Stefan Bräse

Chemistry Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt

E-mail: alaahassan2001@yahoo.com

Abstract: The reaction of (substituted) alkenylidene-hydrazinecarbothioamides with 2-(1,3-dioxo-2,3-dihydro-1H-inden-2-ylidene)propanedinitrile led to the formation of 1,3-dioxospiroindene[1,3]-thiazine and thioxoindeno[2,1-d]imidazolone derivatives in modest yields. In addition, 1,3-dihydroxyindan-2-ylidenepropanedinitrile was found. Explanations of these conversions involving nucleophilic reactions and condensations are presented.

Keywords: alkenylidene-hydrazinecarbothioamides – dioxospiroindene[1,3]thiazine – thioxoindeno [2,1-d]imidazolone

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-012-0145-3

Chemical Papers 66 (4) 295–303 (2012)