反应详情

To a stirred clear and colorless solution of the benzyl (4aR,7aR)-2-(benzoylamino)-7a-(5-cyanothiophen-2-yl)-4a,5,7,7a-tetrahydropyrrolo[3,4-d][1,3]thiazine-6(4H)-carboxylate (405 mg, 0.806 mmol) in acetonitrile (16 mL) under an atmosphere of nitrogen at room temperature is added iodotrimethylsilane (345 μL, 2.42 μmol). The resulting pale yellow solution is stirred at room temperature for 70 minutes. Methanol (391 μL, 9.67 mmol) is added and the pale yellow mixture is stirred for 5 minutes, and then concentrated under reduced pressure. The residue is partially purified by silica gel chromatography, eluting with a dichloromethane/methanol, gradient from 99:1 to 90:10, to give the title compound (349 mg, 118%) as a pale yellow solid (assume quantitative recovery and carry partially purified material into next step). MS/ES (m/z) 369.0 (M+H).

1. stirringthe pale yellow mixture is stirred for 5 minutes
2. concentrationconcentrated under reduced pressure
3. customThe residue is partially purified by silica gel chromatography
4. washeluting with a dichloromethane/methanol, gradient from 99:1 to 90:10