[Cl:1][CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][C:7]([OH:9])=[O:8].[CH2:10](O)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1.O>C1(C)C=CC=CC=1.C1(C)C=CC(S(O)(=O)=O)=CC=1>[Cl:1][CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][C:7]([O:9][CH2:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)=[O:8]46.5 g (0.3 mole) of 6-chlorohexanoic acid and 35.6 g of benzyl alcohol in 500 ml of toluene are heated in the presence of 1 g of p-toluenesulphonic acid, using a water separator. When the reaction has ended, the mixture is washed with 5% strength sodium bicarbonate solution and water, dried with sodium sulphate and concentrated and the residue is distilled, 61.5 g (85% of theory) of benzyl 6-chlorohexanoate of boiling point 163° to 165°/4 mm being obtained.
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