反应详情

tert-Butyl 2-[6-(4-oxo-4H-1,3-benzothiazin-2-yl)-2-pyridyl]ethylcarbamate (0.35 g, 0.91 mmol) was dissolved in trifluoroacetic acid (4 ml), and the mixture was stirred at room temperature for 2 hrs. The solvent was evaporated, and the residue was recrystallized from methanol-diisopropyl ether to give the titled compound (0.33 g, 91%) as white crystals.

1. customThe solvent was evaporated
2. customthe residue was recrystallized from methanol-diisopropyl ether