Synthesis of benzothiet from benzo[b]thiophen 1,1-dioxide

Abstract
Benzothiet, the parent member of a new class of compounds, has been obained by the vacuum flash pyrolysis of benzo[b]thiophen 1,1-dioxide; it is fairly stable at room temparature but dimerizes above 100 °C giving 6H,12H-dibenzo[b,f][1,5]dithiocin.