Facile synthesis of 4,6-dihydrothieno[3,4-b]thiophene 5,5-dioxide. A synthetic equivalent of 2,3-dihydro-2,3-dimethylenethiophene
- 1 January 1991
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 18,p. 1287-1288
- https://doi.org/10.1039/c39910001287
Abstract
4,6-Dihydrothieno[3,4-b]thiophene 5,5-dioxide 4, a stable precursor of 2,3-dihydro-2,3-dimethylenethiophene 3, conveniently prepared from 4-bromo-3-chloro-2,3-dihydrothiophene S,S-dioxide, can easily be alkylated and loses SO2 upon heating so that 4 serves as a useful synthetic equivalent of 3.Keywords
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