反应详情

To a solution of Boc-piperidinone (1 g, 5 mmol) and tetrabutylammonium cyanate (2.86 g, 10 mmol) in MeOH (12 mL) was added cyclohexyl isocyanide (0.62 mL, 5 mmol) and pent-4-en-1-amine hydrochloride (732 mg, 6 mmol, prepared from the LAH reduction of 4-cyano-butene) in MeOH (8 mL) dropwise. The reaction mixture was stirred at rt for 1.5 h, diluted with EtOAC, washes with aq NaHCO3, brine, dried over sodium sulfate, concentrated in vacuo and purified by flash chromatography (silica gel, EtOAc) to provide the desired product LRMS (M+1)=419.

1. additiondiluted with EtOAC
2. dry with materialdried over sodium sulfate
3. concentrationconcentrated in vacuo
4. custompurified by flash chromatography (silica gel, EtOAc)