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A mixture of 4-(4-fluorophenethyl)-3-methoxycarbonylbenzoic acid (16.5 g, 54.88 mmol), tetrahydrofuran (500 ml) and borane in tetrahydrofuran (1 M. complex, 218 ml, 218 mmol) was stirred under an inert atmosphere at reflux for 6 hours. The reaction was cooled to ambient temperature and methanol (1 L) was added. It was then evaporated to dryness to give a dark oil which was purified by flash chromatography using iso-hexane/ethyl acetate (1:1) as eluant to give as a clear gum methyl 2-(4-fluorophenethyl)-5-hydroxymethylbenzoate (13.10 g).

1. temperatureat reflux for 6 hours
2. customIt was then evaporated to dryness
3. customto give a dark oil which
4. customwas purified by flash chromatography