[CH:1]1([CH:4]([C:11]2[CH:16]=[C:15](O)[N:14]=[CH:13][N:12]=2)[CH2:5][C:6]([O:8][CH2:9][CH3:10])=[O:7])[CH2:3][CH2:2]1.CN(C=O)C.C(Cl)(=O)C([Cl:26])=O.Cl>C(OCC)(=O)C>[Cl:26][C:15]1[N:14]=[CH:13][N:12]=[C:11]([CH:4]([CH:1]2[CH2:3][CH2:2]2)[CH2:5][C:6]([O:8][CH2:9][CH3:10])=[O:7])[CH:16]=1Under a nitrogen atmosphere, to a solution of ethyl 3-cyclopropyl-3-(6-hydroxypyrimidin-4-yl)propanoate (1.00 g) and DMF (66 μL) in ethyl acetate (11 mL) was added oxalyl dichloride (1.11 mL) at 0° C., and the mixture was stirred at room temperature for 1 hr. A small amount of 1N hydrochloric acid was added to the reaction mixture, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane) to give the title compound (929 mg) as a colorless oil.
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