反应详情

温度

80 °C

10 g (25.9 mmol) of methyl 3-(2-hydroxy-2-methoxycarbonyl-1,1-di-phenylethoxy)-2,2-dimethylpropionate were dissolved in 40 ml of DMF under N2, 1.78 g (13 mmol) of K2CO3 and 5.2 g (25.9 mmol) of 2-methanesulfonyl-4-methoxy-6-methylpyrimidine were added, and the mixture was stirred at 80° C. for 2 h. It was subsequently diluted with 40 ml of H2O and extracted twice with 30 ml of diethyl ether, the organic phase was dried over MgSO4 and concentrated, and the residue was purified by chromatography on silica gel with ethyl acetate/cyclohexane mixtures. Crystallization from diethyl ether/hexane resulted in 11.8 g (90%) of the product as colorless crystals.

1. extractionextracted twice with 30 ml of diethyl ether
2. dry with materialthe organic phase was dried over MgSO4
3. concentrationconcentrated
4. customthe residue was purified by chromatography on silica gel with ethyl acetate/cyclohexane mixtures
5. customCrystallization from diethyl ether/hexane