Butyl bromide → 3-n-Butyl-1-(4-nitrophenyl)-3-azabicyclo[3.1.1]heptane-2,4-dione

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Reaction Steps

0.36 g of sodium hydride is added to a solution of 2.46 g of 1-(4-nitrophenyl)-3-azabicyclo[3.1.1]heptane-2,4-dione in 25 ml of N,N-dimethylformamide and the whole is stirred at room temperature for 30 minutes. 1.6 ml of n-butyl bromide dissolved in 10 ml of N,N-dimethylformamide are then added dropwise thereto. When the reaction is complete, the reaction mixture is freed of N,N-dimethylformamide. The residue is partitioned between ethyl acetate and water, and the organic phase is dried over magnesium sulphate and, after concentration by evaporation and subsequent recrystallisation from ethyl acetate/petroleum ether, the product is obtained having a melting point of 120°-123°.

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