Water → HCID 22725170, compound

Participants

Reaction Steps

To a well stirred solution of 5-(benzyloxycarbonyl)-1,6-dihydro-2-methoxy-4-ethyl-6-(2,4-difluorophenyl)pyrimidine (22.5 g, 59.3 mmol) and 4-(N,N-dimethylamino)pyridine (9.3 g, 75.8 mmol) in CH2Cl2 (200 mL) was added powdered 4-nitrophenyl chloroformate (15.3 g, 75.8 mmol) at 0° C. The reaction mixture was stirred for 12 h at room temperature and then water (50 mL) was added. The pH of the aqueous layer was adjusted to 10-11 by the addition of 6 N sodium hydroxide. The dichloromethane layer was separated and dried (Na2SO4). Solvent was evaporated in vacuo and the residue was purified by column chromatography (SiO2, dichloromethane/hexane, 20%-50%) to yield the product as a viscous oil (32.0 g, 98%).

Provenance & Evidence