反应详情

A mixture of racemic (2′S,3S,4′R)-6-chloro-4′-[5-chloro-2-(1-ethyl-1-methoxycarbonyl-propoxy)-phenyl]-2′-(5-fluoro-2-methyl-phenyl)spiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione (200 mg, 0.33 mmol), LiOH.H2O (69 mg, 1.16 mmol), H2O (2 mL) and methanol (20 mL) was refluxed for 2 h. After cooled to room temperature, the solution was concentrated and the residue was acidified to “pH” 2-3 by addition of concentrated HCl solution. The precipitate was collected by filtration to give the title compound as a white solid (57 mg).

1. temperaturewas refluxed for 2 h
2. concentrationthe solution was concentrated
3. additionby addition of concentrated HCl solution
4. filtrationThe precipitate was collected by filtration