A convenient synthesis of N, N-disubstituted 4H-3, 1-benzothiazin-2-amines from aryl (2- isothiocyanatophenyl) methanones using a two-pot procedure has been developed. Thus, treatment of these isothiocyanato ketones with secondary amines gave the corresponding keto thioureas, which were allowed to react with sodium borohydride or methylmagnesium bromide to afford 1, 1-dialkyl-3-{2-[aryl (hydroxy) methyl] phenyl} thioureas or 1, 1-dialkyl-3 ...
