New Route to 3-Alkylthiazolo[3,2-a]benzimidazole Derivatives
Received: 29 October 2004 / Accepted: 16 December 2004 / Published: 28 February 2005
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3-Alkyl-thiazolo[3,2-a]benzimidazole derivatives are obtained in high yieldsvia the corresponding 4-alkyl-N-3-(2-aminophenyl)-thiazoline-2-thiones which are easilyprepared from 1,2-diaminobenzene, CS2
and halogenoketones. This new route comparesadvantageously with the classical mercaptobenzimidazole routes in term of simplicity,isolated yields and availability of the starting materials.