Synthesis of nitromethyl-, N-methylindolyl-, or N-methylindolylnitromethyl-substituted 1,4-benzothiazin(diazin)ones and 3-methyl-1,4-benzoxazinones from alkyl 3-nitroacrylates

The reactions of alkyl 3-nitroacrylates and ethyl 2-(1-methyl-1 H -indol-3-yl)-3-nitroacrylate with о -aminothiophenol, о -aminophenol, о -phenylenediamine, and their substituted analogs were used for the preparation of 2-(nitromethyl)-2 H -1,4-benzothiazin-3(4 H )-one, 2-(1-methyl-1 H -indol-3-yl)-2-(nitromethyl)-2 H -1,4-benzothiazin-3(4 H )-one, 3-methyl-2 H -1,4-benzoxazin-2-ones, and 3-(1-methyl-1 H -indol-3-yl)quinoxalin-2(1 H )-ones that were structurally characterized.