反应详情

温度

110 °C

To a mixture of 1-(3-chlorophenyl)-3-trimethylsilyoxy-2-aza-1,3-butadiene (0.25 g, 1 mmol) prepared in example 1b, and toluene (4 mL) was added E/Z-6-chloro-3-(3,3-dimethyl-butylidene)-1,3-dihydro-indol-2-one (0.25 g, 1 mmol) prepared in example 1a. The reaction mixture was heated in a sealed tube under nitrogen at 110° C. for 18 h. The mixture was cooled to room temperature, and methanol (10 mL) was added. The mixture was concentrated and the residue was purified by chromatography (EtOAc/hexanes=2:1) to give racemic (2′S,3S,4′S)-6-chloro-2′-(3-chlorophenyl)-4′-(2,2-dimethylpropyl)spiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione as a brown solid (Yield 0.15 g, 35%).

1. temperatureThe mixture was cooled to room temperature
2. concentrationThe mixture was concentrated
3. customthe residue was purified by chromatography (EtOAc/hexanes=2:1)