反应详情

2-Chloropyrimidin-5-ol (1 g, 7.66 mmol) and sodium 2-chloro-2,2-difluoroacetate (3.50 g, 22.98 mmol) in N,N-dimethylformamide (20 mL) and water (0.2 mL) were heated to 90° C. for 24 hours and concentrated in vacuo. The residue was purified by column chromatography (5-30% ethyl acetate/hexanes) to afford 2-chloro-5-(difluoromethoxy)pyrimidine (549 mg, 3.04 mmol, 39.7% yield) as a pale yellow oil. MS (LC/MS) R.T.=1.32; [M+H]+=181.14.

1. concentrationconcentrated in vacuo
2. customThe residue was purified by column chromatography (5-30% ethyl acetate/hexanes)