Phenacyl bromide → Phenacyl 3-hydroxy-2-n-tetradecyl-11-icosenoate

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Reaction Steps

3-Hydroxy-2-n-tetradecyl-11-icosenoic acid (II)(3.68 g, 7.04 millimole) was dissolved in dry tetrahydrofuran (100 ml), and phenacyl bromide (2.10 g, 10.56 millimole) and triethyl amine (1.47 ml, 10.56 millimole) were successively added thereto with ice cooling. The reaction mixture was allowed to warm to room temperature, and to react for 13.5 hours. The insoluble matter in the reaction mixture was filtered off with suction and the solvent was distilled off from the filtrate. The residue was dissolved in methylene chloride and the obtained solution was successively washed with water and saturated aqueous sodium chloride solution, and dried over anhydrous sodium sulfate. The inorganic salt was filtered off and the solvent was distilled off from the filtrate. The obtained residue was purified over a silicagel column (benzene -→ benzene:ethyl acetate=8:2) to give phenacyl 3-hydroxy-2-n-tetradecyl-11-icosenoate (IV)(998.6 mg, yield 22.1%) in the form of white viscous solid. IR(νmaxKBr, cm-1); 3340, 2900, 2850, 1740, 1705

Provenance & Evidence