Dimethylformamide → 1-Hydroxy-3-[4-(tetradecyloxy)phenyl]-2-propanone

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a suspension of about 60.0 g of (4-tetradecyloxyphenyl)acetic acid in about 400 ml of methylene chloride containing about 0.63 ml of dimethylformamide was added, over about 10 minutes about 27.31 g of oxalyl chloride. After about 2 hours the solvent was removed, the residue was dissolved in hexane and filtered through celite. The solvent was removed and the residue dried in vacuo. An about 110.82 g portion of tris-trimethylsilyloxyethylene was added and the solution was heated at about 95° C., under argon, for about 5 hours. The solution was poured into a mixture of about 30 ml of concentrated hydrochloric acid (about 12N) about 170 ml of water and about 200 ml of tetrahydrofuran with stirring and heat. This mixture was refluxed about 10 minutes, ethyl acetate was added, the warm organic layer separated and washed with brine, saturated sodium bicarbonate solution, then brine, dried and the solvent removed, giving, after recrystallization from hexane, about 52 g of the desired title compound as a white solid, mp. 84°-85° C.

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