Abnormally mild synthesis of bis(dithiolo)pyrroles from 2,5-dimethylpyrroles.
[chemical reaction: see text]. Treatment of N-substituted 2,5-dimethylpyrroles 2 with an equilibrated mixture of disulfur dichloride and DABCO in chloroform at 0 degrees C gives pentathiepinopyrroles 3 in moderate yields; further reaction of 3 with the same mixture at room temperature leads, in an extensive reaction cascade, to bis(dithiolo)pyrroles 4 in high yield; 2 can be converted into 4 in a one-pot operation under unusually mild conditions.
Amelichev
Stanislav A
SA
N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect, 47, 119991 Moscow, Russia.
Aysin
Rinat R
RR
Konstantinova
Lidia S
LS
Obruchnikova
Natalia V
NV
Rakitin
Oleg A
OA
Rees
Charles W
CW