m-Chloroperbenzoic acid → 2-(6-Methylsulfinylmethyl-2-pyridyl)-4H-1,3-benzothiazine-4-one

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Reaction Steps

2-(6-Methylthiomethyl-2-pyridyl)-4H-1,3-benzothiazine-4-one (0.10 g, 0.33 mmol) was dissolved in chloroform (50 ml), and a solution of 3-chloroperbenzoic acid (ca. 77%, 0.075 g, 0.33 mmol) in chloroform (10 ml) was added dropwise thereto. The reaction mixture was stirred at room temperature for 1 hr. The solvent was evaporated, and the residue was recrystallized from ethyl acetate to give the titled compound (0.052 g, 50%) as pale yellow crystals.

Provenance & Evidence