(4-Nitrophenyl)methyl 4-chloro-3-oxobutanoate → HCID 178520786, 화합물

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반응 단계

In 100 ml of acetic acid is dissolved 50 g (0.184 mol, uncorrected for purity) of the crude p-nitrobenzyl γ-chloroacetoacetate obtained in 1), and the solution is cooled to 5° C. or lower, and a solution of 12.7 g (0.184 mol) of sodium nitrite in 50 ml of water is added dropwise thereto at 5° C. or lower over a period of an hour. After completion of the addition, the mixture is stirred for 30 minutes and poured into 600 ml of ice water and extracted with 300-ml and 200-ml portions of ethyl acetate. The organic layers are combined and washed with saturated aqueous sodium chloride, dried over sodium sulfate and concentrated to dryness to give 54.0 g of p-nitrobenzyl α-hydroxyimino-γ-chloroacetoacetate as an oil.

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