Hydroxyphenylacetic acid → Benzyl 2-(4-hydroxyphenyl)acetate

Participants

Reaction Conditions

Reaction Steps

Sodium hydride (50% w/w dispersion in mineral oil, 3.7 g) was treated under argon with repeated washes of hexane. The oil-free residue was suspended in dry DMF (100 ml) and 4-hydroxyphenylacetic acid (13.0 g) was added portionwise to the stirred cooled (4° C.) mixture. After 30 minutes, benzyl bormide (9.2 ml) was added dropwise and, after a further 1 hour at 4° C., stirring was continued overnight at ambient temperature. The solvent was evaporated in vacuo and the residue partitioned between ethyl acetate and water. The aqueous phase was re-extracted with further ethyl acetate and the combined organic extracts washed with water and brine, then dried (MgSO4) and evaporated. The crystaline residue gave benzyl 4-hydroxyphenylacetate, 17.8 g, as off-white crystals: m.p. 70°-72° C. NMR (CDCl3) δ7.32(5H,m), 7.14(2H,d), 6.76(2H,d), 5.12(2H,s), 3.59(2H,s); m/e 242 (M·)+.

Provenance & Evidence