Methanol → 5-(3-Hydroxymethyl-phenyl)-oxazole-4-carboxylic acid methyl ester

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Reaction Conditions

Reaction Steps

In a flame dried round-bottomed flask equipped with a magnetic stir bar and under inert atmosphere (N2), a suspension of 5-(3-carboxy-phenyl)-oxazole-4-carboxylic acid methyl ester (500 mg, 2.02 mmol) in THF (14.0 mL) at 0° C. was treated dropwise with a BH3 (10.1 mL of a 1M solution in THF, 10.11 mmol). The resulting mixture was stirred at 0° C. for 4 h. MeOH (14 mL) was then added dropwise. After 30 min, the solvent was removed under reduced pressure. EA (20 mL) was added and the organic phase was washed with 1N NaOH (10 mL), water (10 mL) and brine (10 mL). The organic layer was dried over MgSO4, filtered, and the solvent removed under reduced pressure. Purification of the residue by FC (93:7 CH2Cl2-MeOH) gave the title compound as a white solid. TLC: rf (93:7 CH2Cl2-MeOH)=0.32. LC-MS-conditions 02: tR=0.76 min, [M+H]+=234.39.

Provenance & Evidence