B. Unterhalt et S. Moghaddam, 2,3-DIHYDRO-3-OXO-THIENOISOTHIAZOLE 1,1-D IOXIDES AND THEIR 3-THIOXO COMPOUNDS, Die Pharmazie, 49(2-3), 1994, pp. 115-117
Dihydro-3-oxo-thieno[2,3-d]isothiazole-1,1-dioxide and Dihydro-3-oxo-t
hieno[3,2-d]isothiazole-1,1-dioxide are synthesized. The latter compou
nd can be prepared from 2-chlorothiophene in five steps. Both substanc
es react with Lawessons reagent to give the 3-thioxo derivatives.