Lithium Hydroxide → 2-Ethoxy-2'-methyl-[1,1'-biphenyl]-4-carboxylic acid

Participants

Reaction Steps

To a stirred solution of methyl 2-ethoxy-2′-methyl-1,1′-biphenyl-4-carboxylate (11 g, 40.6 mmol) in a mixture of THF (100 mL) and water (10 mL) was added lithium hydroxide (6.82 g, 162.7 mmol) in portions. After 24 hours at RT, the reaction mixture was evaporated and the residue was taken up with water. The aqueous layer was acidified with a concentrated aqueous solution of HCl and extracted with EtOAc. The organic layer was washed with brine, dried (Na2SO4) and concentrated under vacuum affording of the title compound as pale yellow solid (9.7 g, 93%). LC/MS (Method B): 255.0 (M−H)−. 1H-NMR (DMSO-d6, 400 MHz) δ 13.02 (br s, 1H), 7.57 (m, 2H), 7.18-7.25 (m, 4H), 7.09 (d, 1H), 4.05 (q, 2H), 2.05 (s, 3H), 1.18 (t, 3H).

Provenance & Evidence