反应详情

To a solution of tert-butyl (1-ethoxy-3-hydroxypropan-2-yl)carbamate (2.2 g, 9.4 mmol) in DCM (40 mL) was added methanesulfonylchloride (2.10 g, 18.8 mmol) at 0° C. The reaction mixture was allowed to warm to ambient temperature. After 12 hours, the reaction mixture was concentrated under reduced pressure. The residue was purified via chromatography on silica gel to afford 2-[(tert-butoxycarbonyl)amino]-3-ethoxypropyl methanesulfonate. MS ESI calc'd. for C11H24NO6S [M+H]+ 298. found 298. 1H NMR (400 MHz, CDCl3) δ 4.95 (s, 1H), 4.28 (d, J=8.0 Hz, 1H), 4.13-4.11 (m, 1H), 3.58-3.48 (m, 5H), 3.03 (s, 3H), 1.45 (s, 9H), 1.18 (t, J=6.8 Hz, 3H).

1. concentrationthe reaction mixture was concentrated under reduced pressure
2. customThe residue was purified via chromatography on silica gel