反应详情

温度

0 °C

To a solution of (R)-3-hydroxypiperidine-1-carboxylic acid tert-butyl ester (6.51 g, 32.3 mmol) and triethylamine (6.8 ml, 1.5 mol eq) in dichloromethane (70 ml) at 0° C. was added a solution of methanesulphonyl chloride (3.73 ml, 1.5 mol) in dichloromethane (30 ml) over 30 minutes. The reaction was stirred at 0° C. for 2 hours. Saturated sodium hydrogen carbonate (100 ml) was added slowly. The organic phase was separated, washed with brine and dried over magnesium sulphate. Evaporation under reduced pressure yielded (R)-3-methanesulphonyloxypiperidine-1-carboxylic acid tert-butyl ester, 9.03 g (100%). NMR (CDCl3 7.27d) m 4.73(1H), m 3.63d(2H), m 3.44d(1H), m 3.32d (1H), s 3.05d(3H), m 1.95d(2H), m 1.83d(1 H), m 1.54d(1H), s 1.46d(9H)

1. customThe organic phase was separated
2. washwashed with brine
3. dry with materialdried over magnesium sulphate
4. customEvaporation under reduced pressure