3-(Methoxycarbonyl)benzoic acid → Benzoic acid, 3-(hydroxymethyl)-, methyl ester

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of 3-(methoxycarbonyl)benzoic acid (1.05 g, 5.83 mmol) in THF (25 mL) was cooled to 0° C., and then treated with the dropwise addition of 2.0 M borane-methylsulfide complex in THF (14.57 mL, 29.1 mmol) at a rate which did not allow the temperature to exceed 5° C. The mixture was stirred at 0° C. for 15 minutes, and then allowed to warm to room temperature where it stirred for 4 hours. After this time, the reaction was cooled to 0° C. and then quenched with the addition of small pieces of ice, causing vigorous gas evolution. When gas evolution had ceased, the mixture was diluted with brine and extracted 3× with ethyl acetate. The combined organic phases were washed 3× with diluted bleach to remove residual methyl sulfide, 3× with saturated sodium carbonate to remove any unreacted acid, 1× with water, 1× with brine, dried over sodium sulfate and then concentrated in vacuo to yield the methyl 3-(hydroxymethyl)benzoate (845 mg, 5.09 mmol, 87% yield) as a colorless oil.

Herkunft & Nachweise