Acrylonitrile → HCID 22562162, 화합물

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A mixture of 3 g (15.3 mmol) of 4-trifluoroacetamidopiperidine, 3 g (4.25 mL, 30.6 mmol) of triethylamine, 3 mL (45.9 mmol) of acrylonitrile in 10 mL of THF was stirred at room temperature for 17 hr. The solvent and volatile were evaporated under reduced pressure. The residue was dissolved in 20 mL of methanol and 4 mL of 30% NH4OH and the solution was refluxed for 5 hr. The solvent was evaporated under reduced pressure and the residue was purified by column chromatography on silica gel eluting first with 500 mL of dichloromethane, then 500 mL of 0.5% methanol/dichloromethane, followed by 1000 mL of 9:1:0.1 dichloromethane/methanol/ammonium hydroxide to give 0.7 g (30% yield) of the N-(2-cyanoethyl)-4-aminopiperidine. Step 4: Preparation of 6-(2-chlorophenyl)-2-(N-2-cyanoethylpiperidyl-4-amino)-pyrido[2,3-d]-pyrimidin-7-ol

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