Abstract Treatment of 1-(2-alkylsulfinylphenyl) pyrroles with trifluoroacetic acid in refluxing toluene gives 4-substituted pyrrolo [2, 1-c][1, 4] benzothiazines in good yield when the alkyl group bears an electron withdrawing substituent on the α-carbon. In the absence of such a group, starting material is recovered. The sulfoxides are prepared by oxidation (mCBPA) of the corresponding sulfide. The sulfides are prepared from 2-aminobenzenethiol either by ...
