Abstract
The oxidation of thioureas
in the presence of pyrroles by halogens or hydrogen
peroxide in acidic conditions gives S-pyrrolylisothiouronium salts in high yield. The mechanism
of the reaction is believed to involve oxidation of the thiourea to a sulphenyl halide species which then reacts with the pyrrole in a typical electrophilic substitution. The
reaction has been extended to include several thioamides
and heterocyclic thiols as well
as thiourea.
Cited by
24 articles.
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