反应详情

4.80 g of sodium hydride (55% oil dispersion) was suspended in 50 ml of N,N-dimethylformamide. Into this, 17.60 g of diethyl malonate was added dropwise over a period of about 0.5 hours at room temperature under a nitrogen atmosphere. The mixture was stirred further for 0.5 hours at the same temperature, then, to the mixture was added 5.73 g of 2-chloropyrimidine. The mixture was stirred for 3 hours at 100° C. The reaction mixture was allowed to cool to room temperature. To the reaction mixture was added ice water, and extracted with ethyl acetate. The organic layer was washed with saturated brine three times, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. 18.84 g of the resultant residue was subjected to silica gel column chromatography, to obtain 5.09 g of diethyl (2-pyrimidinyl)malonate.

1. stirringThe mixture was stirred for 3 hours at 100° C
2. extractionextracted with ethyl acetate
3. washThe organic layer was washed with saturated brine three times
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated under reduced pressure