反应详情

A mixture of 50.9 g (0.12 mol) of 3-hydroxy-5-(octadecyloxy)benzoic acid methyl ester, 21.6 ml (0.18 mol) of benzyl bromide and 50 g (0.36 mol) of potassium carbonate in 750 ml of DMF was stirred and heated at 85° for 65 hours. The reaction mixture was filtered and the filtrate was concentrated at reduced pressure. The residue was recrystallized from methylene chloride-methanol to give 46.3 g (75% yield, mp 61°-63°) of 3-(octadecyloxy)-5-(phenylmethoxy)benzoic acid methyl ester. The structure was confirmed by the nmr spectrum.

1. temperatureheated at 85° for 65 hours
2. filtrationThe reaction mixture was filtered
3. concentrationthe filtrate was concentrated at reduced pressure
4. customThe residue was recrystallized from methylene chloride-methanol