反应详情

To a mixture of rac-4-phenyl-2,8-diaza-spiro[4.5]decan-1-one (8.0 g, 34.7 mmol) in AcOH (80 mL) was added cyclohexanone (3-4 g, 34.7 mmol) followed by the dropwise addition of TMSCN (10.4 g, 104.2 mmol) and the resulting mixture stirred at room temperature for 5 days. The resulting mixture was poured onto ice—sodium hydroxide (25%, 200 mL) and the resulting white solid filtered off. The solid was dissolved in DCM (50 mL) and washed with water (40 mL) and dried over sodium sulfate. Filtration and evaporation afforded the title compound (7.25 g, 62%) as a white solid after purification by silica gel chromatography eluting with DCM: MeOH (9: 1). MS: m/e=338.3 (M+H).

1. additionThe resulting mixture was poured onto ice—sodium hydroxide (25%, 200 mL)
2. filtrationthe resulting white solid filtered off
3. dissolutionThe solid was dissolved in DCM (50 mL)
4. washwashed with water (40 mL)
5. dry with materialdried over sodium sulfate
6. filtrationFiltration and evaporation