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Polychlorination of thiophene. A reinvestigation
Author(s) -
Temciuc Marcel,
Hörnfeldt AnnaBritta,
Gronowitz Salo
Publication year - 1995
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570320317
Subject(s) - thionyl chloride , chemistry , sulfuryl chloride , thiophene , catalysis , chloride , ferric , organic chemistry
Some old controversies in the literature with regard to the structures of trichlorothiophenes have been elucidated. In the course of these studies, we found that the best method for the preparation of 2,3,5‐trichlorothiophene is the direct chlorination of thiophene in the presence of catalytic amounts of ferric chloride. If 2,5‐dichlorothiophene is available 2,3,5‐trichlorothiophene can also be obtained in good yields through chlorination with thionyl chloride and sulfuryl chloride, using aluminum trichloride as catalyst.