Abstract
A new reaction in the benzimidazole series, viz., replacement of the mercapto group by chlorine by the action of thionyl chloride on 2-thiobenzimidazoles, was discovered. Benzoxazolone is formed by treatment of 2-thiobenzoxazole with thionyl chloride, and 2,2′-dithiobis(2-benzothiazole) is formed from 2-thiobenzothiazole.
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