反应详情

温度

-10 °C

To 22 ml of a 0.5M solution of cyclopropylmagnesium bromide in tetrahydrofuran was added 2.2 g [(methoxy-methyl-carbamoyl)-methyl]-carbamic acid tert-butyl ester at −10° C. (acetone/ice) and the mixture was stirred at −10° C. for 30 min and then at ambient temperature for 30 min. (tic shows little conversion heptanes:ethyl acetate=1:1) To the resulting colorless solution was added another 22 ml of a 0.5M solution of cyclopropylmagnesium bromide in tetrahydrofuran and the mixture was stirred at ambient temperature for 18 h. The reaction mixture was quenched by addition of 10% citric acid. The phases were separated and the organic phase was purified by chromatography on silica gel with a gradient of heptane:ethyl acetate=9:1 to 1:1 to yield 1.300 g of the title compound as colorless oil. MS (EI): 199 (M+).

1. stirringthe mixture was stirred at ambient temperature for 18 h
2. customThe reaction mixture was quenched by addition of 10% citric acid
3. customThe phases were separated
4. customthe organic phase was purified by chromatography on silica gel with a gradient of heptane