反应详情

A mixture of 4-hydroxymethylnaphthoic acid (10 g, 50 mmol), methanol (300 mL), and conc. H2 SO4 (2 mL) was refluxed overnight. The insolubles were filtered off and the filtrate was concentrated. The residue was taken up in ethyl acetate and washed with aqueous NaHCO3 (2×), brine, dried over MgSO4, and concentrated to give a yellow oil. Silica gel column chromatography using ethyl acetate/hexane (1/3) gave the desired product as a yellow oil (3.3 g, 35%).

1. temperaturewas refluxed overnight
2. filtrationThe insolubles were filtered off
3. concentrationthe filtrate was concentrated
4. washwashed with aqueous NaHCO3 (2×), brine
5. dry with materialdried over MgSO4
6. concentrationconcentrated
7. customto give a yellow oil