Methyl iodide → 4-Bromo-2-ethylbenzoic acid

Participants

Reaction Conditions

Reaction Steps

To a 0° C. solution of LDA (10.7 mL, 21.39 mmol) in THF (20 mL) was added 4-bromo-2-methylbenzoic acid (2 g, 9.3 mmol) in THF (5 mL). The mixture was stirred at 0° C. for 1 h, cooled to −70° C., and then MeI (2.3 mL, 37.20 mmol) was added dropwise. The mixture was allowed to warm up to 0° C., stirred for 3 h, then quenched with H2O, and the pH was adjusted to 1-2 with 3 N HCl. The mixture was then diluted with water and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over Na2SO4 and concentrated in vacuo. Purification by normal phase silica gel column provided 4-bromo-2-ethylbenzoic acid as a white solid.

Provenance & Evidence