反应详情

2.1 g (19 mmol) of potassium tert-butylate are added to a suspension of 2.2 g (17.2 mmol) of 5-chloro-pyrimidin-4-ylamine in tert-butanol (50 ml) and the temperature is kept at 60° C. After stirring for 1 h, a solution of 4.1 g (17.2 mmol) of 4-benzyloxy-benzyl chloride in tert-butanol (40 ml) is added dropwise and the reaction mixture is stirred at this temperature for 1 h. The reaction mixture is cooled to room temperature and poured into water (300 ml). The precipitate is filtered off and the filtrate is extracted with ethyl acetate (2×200 ml). The combined organic layers are dried with magnesium sulphate and concentrated in vacuo. The residue is purified by chromatography on silica gel (toluene/dioxane=6:1) to yield 2.0 g (37%) of the title compound as a beige powder of m.p. 95°-100° C.

1. customis kept at 60° C
2. stirringthe reaction mixture is stirred at this temperature for 1 h
3. filtrationThe precipitate is filtered off
4. extractionthe filtrate is extracted with ethyl acetate (2×200 ml)
5. dry with materialThe combined organic layers are dried with magnesium sulphate
6. concentrationconcentrated in vacuo
7. customThe residue is purified by chromatography on silica gel (toluene/dioxane=6:1)