The preparation and some properties of vinylene dithiocyanate were described by Söderbäck1 in 1925 and, more recently, in 1969 some substituted thiocyanato-isothiocyanato ethylenes by Zbiral and Hengstberger2. We have reported on the formation of isothiocyanates by the fission of N-heterocyclic compounds in the presence of thiophosgene and base3. This paper describes a further application of this method to the preparation of vinylenedi-isothiocyanate (1) from imidazole.
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Hull et al. (1980) studied this question.
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