反应详情

To a solution of 2-chloro-4-(3-chloro-4-methoxybenzylamino)-5-ethoxycarbonylpyrimidine (prepared in Example 95) 356 mg and 2-hydroxymethylpyridine 109 mg in anhydrous tetrahydrofuran 4.5 ml is added potassium tert-butoxide 112 mg under ice cooling, and the mixture is stirred for 30 minutes. The reaction mixture is diluted with water, extracted twice with ethyl acetate. The combined organic layer is washed with water and an aqueous saturated sodium chloride solution, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue is purified by silica gel chromatography (silica gel 10 g, solvent; chloroform:ethyl acetate=5:1→2:1) and concentrated in vacuo to give 2-(2-pyridylmethoxy)-4-(3-chloro-4-methoxybenzylamino)-5-ethoxycarbonylpyrimidine (the compound prepared in Example 67-(3)) as a colorless caramel, 338 mg, which is crystallized on standing at room temperature overnight. mp 90–92° C.

1. extractionextracted twice with ethyl acetate
2. washThe combined organic layer is washed with water
3. dry with materialan aqueous saturated sodium chloride solution, dried over anhydrous sodium sulfate
4. concentrationconcentrated in vacuo
5. customThe residue is purified by silica gel chromatography (silica gel 10 g, solvent; chloroform:ethyl acetate=5:1→2:1)
6. concentrationconcentrated in vacuo