反应详情

To a mixture of methyl 2-hydroxy-4-(N,N-dimethylamino)benzoate (7.809 g, 40 mmol), 4-hydroxy-1-tert-butoxycarbonylpiperidine (8.048 g, 40 mmol), triphenylphosphine (11.02 g, 42 mmol), and THF (250 mL) at 0° C. was added diethyl azodicarboxylate (7.1 mL, 45.1 mmol), dropwise. The reaction was warmed to room temperature and stirred overnight. The reaction was concentrated, chromatographed (hexane to 30% EtOAc/hexane), and triturated with ether/hexane to give the desired product as a white solid (5.55 g, 37%).

1. concentrationThe reaction was concentrated
2. customchromatographed (hexane to 30% EtOAc/hexane)
3. customtriturated with ether/hexane