4,5-Dichloro-1,2-dithiole-3-thione 2 undergoes a 1,3-dipolar cycloaddition with DMAD to give stable aliphatic thioacyl chloride 3, which is highly reactive towards nucleophiles such as o-substituted amines to give benzimidazole, benzoxazole and benzothiazole derivatives of 1,3-dithioles 9.
4,5-Dichloro-1,2-dithiole-3-thione in the synthesis of benzimidazole, benzoxazole and benzothiazole derivatives of 1,3-dithioles
V. A. Ogurtsov, O. A. Rakitin, C. W. Rees and A. A. Smolentsev, Mendeleev Commun., 2003, 13, 50 DOI: 10.1070/MC2003v013n02ABEH001750
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