Lithium Hydroxide → HCID 67488047, compound

Participants

Reaction Steps

To the crude 3-[4-(2-Benzyloxyethoxy)-phenyl]-2-(4-tert-butylphenyl)-propionic acid methyl ester from step d dissolved in 20 mL of THF/MeOH/H2O (3:1:1) was added lithium hydroxide (270 mg, 6.5 mmol) After stirring for 5 hrs at rt, the organic solvents were removed under vacuum and the reaction residue diluted further with water (25 mL). The aqueous mixture was extracted with diethyl ether, made acidic with 1 N HCl and extracted again with ethyl acetate. The ethyl acetate portion was then dried over Na2SO4 and concentrated under vacuum to afford 3-[4-(2-Benzyloxyethoxy)-phenyl]-2-(4-tert-butylphenyl)-propionic acid as a semi-solid mass. (456 mg, 81% over 2 steps)

Provenance & Evidence