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Communication | Regular issue | Vol 14, No. 1, 1980, pp.3-6
Published online, 1st January, 1970
DOI: 10.3987/R-1980-01-0003
Acid Catalysed Cyclodehydration versus Sulphur Extrusion of 2-(4-Quinazolinylthio)ketones

Harjit Singh,* Chander S. Gandhi, and Mohinder S. Bal

*Department of Chemistry, Guru Nanak Dev University, Amritsar -143 005, Punjab, India

Abstract

2-(4-Quinazolinylthio)ketones on keeping in minimum amount of sulphuric acid provide only 2-(4(3H)quinazolinylidene)ketones but in an excess of the acid, thiazolo[3,2-c]quinazolin-4-ium cations are also formed.