Abnormally mild synthesis of bis(dithiolo)pyrroles from 2,5-dimethylpyrroles |
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Authors: | Amelichev Stanislav A Aysin Rinat R Konstantinova Lidia S Obruchnikova Natalia V Rakitin Oleg A Rees Charles W |
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Institution: | N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect, 47, 119991 Moscow, Russia. |
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Abstract: | 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. |
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