反应详情

A mixture of 10.0 g (0.02 mol) of 3-hydroxy-5-(octadecyloxy)benzoic acid phenylmethyl ester, 4.3 ml (0.03 mol) of methyl 5-bromovalerate, 5.6 g (0.04 mol) of potassium carbonate and 3.0 g (0.02 mol) of sodium iodide in300 ml of acetone and 75 ml of DMF was stirred at reflux under argon for 40hours. The reaction mixture was filtered and the filtrate was concentrated at reduced pressure to a solid which was recrystallized from methylene chloride-methanol to give 11.3 g (92% yield, mp 40°-42°) of 3-(octadecyloxy)-5-[(5-methoxy-5-oxopentyl)oxy]benzoic acid phenylmethyl ester. The structure was confirmed by nmr and mass spectra.

1. temperatureat reflux under argon for 40hours
2. filtrationThe reaction mixture was filtered
3. concentrationthe filtrate was concentrated at reduced pressure to a solid which
4. customwas recrystallized from methylene chloride-methanol