反应详情

N,N-dimethylformamide(1 drop) was added to a tetrahydrofuran solution(40 ml) of pimelic acid monoethyl ester(25.5 g), and thereto oxalyl chloride(18.8 g) was added dropwise. After stirring for 2 hours at room temperature, the reaction mixture was concentrated. The residue was added dropwise to a mixture of chlorobenzene(61.0 g) and aluminum chloride anhydrous (36.1 g) under ice water. After stirring for 3 hours, the reaction mixture was poured into 1N-hydrochloric acid, and extracted with ethyl acetate. The ethyl acetate layer was washed with water, and dried(MgSO4). The solvent was evaporated to give ethyl 6-(4-chlorobenzoyl)hexanate (37.7 g, 97%) as an oily substance.

1. concentrationthe reaction mixture was concentrated
2. additionThe residue was added dropwise to a mixture of chlorobenzene(61.0 g) and aluminum chloride anhydrous (36.1 g) under ice water
3. stirringAfter stirring for 3 hours
4. additionthe reaction mixture was poured into 1N-hydrochloric acid
5. extractionextracted with ethyl acetate
6. washThe ethyl acetate layer was washed with water, and dried(MgSO4)
7. customThe solvent was evaporated