反应详情

温度

0 °C

7.1 30 g of (2R,4R)-4-hydroxy pyrrolidine-2-carboxylic acid are suspended in 200 ml of methanol and cooled to 0° C. Thionyl chloride (18.1 ml) is subsequently added dropwise at the same temperature distributed over an hour. The reaction mixture (RM) is warmed to room temperature (RT) over 12 h, during which a clear solution forms. The solvent is removed in vacuo, and the residue obtained is recrystallised from ether, giving 50 g of methyl (2R,4R)-4-hydroxypyrrolidine-2-carboxylate; Rt.: 0.386 min; [M+H]+146.2.

1. waitdistributed over an hour
2. temperatureThe reaction mixture (RM) is warmed to room temperature (RT) over 12 h
3. customThe solvent is removed in vacuo
4. customthe residue obtained
5. customis recrystallised from ether