Studies of heterocyclic compounds. Part V. A synthesis of thiothiophthenes and related compounds
- 1 January 1968
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society C: Organic
- p. 2543-2548
- https://doi.org/10.1039/j39680002543
Abstract
Dimethylthioformamide condenses with 3-methyl(ene)-1,2-dithiolium salts in acetic anhydride to give 3-(2-dimethylaminovinyl)-1,2-dithiolium (Vilsmeier) salts. These salts react with sodium hydrogen sulphide to give thiothiophthenes, and with sodium hydroxide to form 3-acylmethylene-3H-1,2-dithioles. H N.m.r. data for these compounds are discussed. An improved procedure for the synthesis of 1,2-dithiolium salts is described.Keywords
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