反应详情

Sodium trimethyl silanolate (72.1 g) and water (7.72 mL, 428.6 mmol) were added to a stirred solution of 3-(4′-cyano-biphenyl-4-yloxymethyl)-1-(4-methoxy-benzoyl)-pyrrolidine-3-carboxylic acid ethyl ester (see Preparation 28) (207.7 g, 428.6 mmol) in acetonitrile (2090 mL). The resulting mixture was stirred at RT for 18 hours. The reaction mixture was filtered and the solid was partitioned between ethyl acetate (2000 mL) and aqueous hydrogen chloride solution (2000 mL, 2M). The organic layer was washed with water (1000 mL) then concentrated under reduced pressure to afford a pale orange foam. This was recrystallised twice, from ethyl acetate (700 mL) then isopropyl alcohol (700 mL) to afford the title compound as a white solid (107.2 g, 55%).

1. filtrationThe reaction mixture was filtered
2. customthe solid was partitioned between ethyl acetate (2000 mL) and aqueous hydrogen chloride solution (2000 mL, 2M)
3. washThe organic layer was washed with water (1000 mL)
4. concentrationthen concentrated under reduced pressure
5. customto afford a pale orange foam
6. customThis was recrystallised twice, from ethyl acetate (700 mL)