Synthesis and X-ray structure of an azathiabenzene derivative, a cyclic sulphimide
Abstract
Decomposition of azidothiophenes (3) gives the thieno[3,2-c][1λ4, 2]thiazines (4), which are stable cyclic sulphimides, the ylidic nature of (4a) being confirmed by its properties and X-ray structure determination; photolysis of the sulphimides (4) gives the thieno[3,2-b]pyrroles (6) suggesting that MeS and PhS undergo very rapid [1,5] sigmatropic shifts.