D. Kaufmann, Viktor A. Zapolォskii, J. Namyslo
Jun 1, 2004
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23
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Journal
Heterocycles
Abstract
An efficient synthesis of perfunctionalized 3-amino-4-nitrothiophenes was developed starting from highly chlorinated 2-nitrobutadiene derivatives. The key step of this new approach is the cyclization reaction of highly nucleophilic, ω-chlorinated butadienyl thiolates generated from 2-(2-diorganylamino- 3,3-dichloro-1-nitroallylidene)-(1,3)dithiolanes upon action of base.