Pyridine → (R)-phenyl (5-cyano-4-((1-methoxypropan-2-yl)oxy)pyridin-2-yl)carbamate

Participants

Reaction Steps

Phenyl chloroformate (1.53 ml, 12.2 mmol) was added drop wise to a mixture of (R)-6-amino-4-((1-methoxypropan-2-yl)oxy)nicotinonitrile (intermediate 146, 1.37 g, 5.55 mmol) and pyridine (0.99 ml, 12.2 mmol) in THF (60 ml) at 0° C. The reaction mixture was stirred for 12 h at room temperature and additional pyridine (0.98 ml, 12.2 mmol) and phenyl chloroformate (1.53 ml, 12.2 mmol) were added. After stirring for a further 36 h at room temperature the reaction mixture was partitioned between EtOAc and saturated aqueous NaHCO3 solution, the organic layer washed with saturated brine, dried over MgSO4 and evaporated. The residue was triturated with Et2O and the product obtained by filtration as a white solid. (UPLC-MS 6) tR 1.04; ESI-MS 328.4 [M+H]+.

Provenance & Evidence