S. M. Hussain, A. M. El-Reedy
Jun 1, 1988
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Influential Citations
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Journal
Phosphorus Sulfur and Silicon and The Related Elements
Abstract
Abstract 3-Hydroxy-1H-pyrido[2,1-b]benzothiazol-1-one (1) reacts with sulphuryl chloride to give the 2-chloro derivative II. Bromination of I yields the 4-bromo derivative VIII. Each of II and VIII condenses with thiourea to afford 2-amino-11H-thiazolo[4′,5′:4,5]pyrido[2,1-b]benzothiazol-11-one (IV) and 2-amino-5H-thiazolo[4′,5′: 4,3]pyrido[2,1-b]benzothiazol-5-one (V), respectively. The structures of the newly synthesised compounds are proved by chemical and spectral methods.