1-methyl-2,2-dioxo-2lambda6,1-benzothiazin-4-one

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Iodomethane (187 ul, 426 mg, 3 mmol) is added dropwise to a suspension of 2,2-Dioxo-1-methyl-2,1-benzothiazin-4(3H)-one ([CAS: 7117-31-9], 220 mg, 1 mmol), K2CO3 (1.38 g, 10 mmol) in 3 mL of dry DMF at room temperature. The resulting mixture is stirred at 60° C. After 2 h, the reaction mixture is filtered, and washed with ethyl acetate (20 mL). The combined solution is concentrated and the residue is purified by flash column (ethyl acetate-heptane v/v 10%) and gives the title compound as white solid (190 mg). the reaction mixture is filtered washed with ethyl acetate (20 mL) The combined solution is concentrated the residue is purified by flash column (ethyl acetate-heptane v/v 10%)

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Iodomethane (187 ul, 426 mg, 3 mmol) is added dropwise to a suspension of 2,2-Dioxo-1-methyl-2,1-benzothiazin-4(3H)-one ([CAS: 7117-31-9], 220 mg, 1 mmol), K2CO3 (1.38 g, 10 mmol) in 3 mL of dry DMF at room temperature. The resulting mixture is stirred at 60° C. After 2 h, the reaction mixture is filtered, and washed with ethyl acetate (20 mL). The combined solution is concentrated and the residue is purified by flash column (ethyl acetate-heptane v/v 10%) and gives the title compound as white solid (190 mg). the reaction mixture is filtered washed with ethyl acetate (20 mL) The combined solution is concentrated the residue is purified by flash column (ethyl acetate-heptane v/v 10%)

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Iodomethane (187 ul, 426 mg, 3 mmol) is added dropwise to a suspension of 2,2-Dioxo-1-methyl-2,1-benzothiazin-4(3H)-one ([CAS: 7117-31-9], 220 mg, 1 mmol), K2CO3 (1.38 g, 10 mmol) in 3 mL of dry DMF at room temperature. The resulting mixture is stirred at 60° C. After 2 h, the reaction mixture is filtered, and washed with ethyl acetate (20 mL). The combined solution is concentrated and the residue is purified by flash column (ethyl acetate-heptane v/v 10%) and gives the title compound as white solid (190 mg). the reaction mixture is filtered washed with ethyl acetate (20 mL) The combined solution is concentrated the residue is purified by flash column (ethyl acetate-heptane v/v 10%)