Citric Acid → HCID 20271475, Verbindung

Beteiligte Stoffe

Reaktionsschritte

1-(4'-methoxyphenyl)-2-bromo-1-ethanone (J. Org. Chem. Soc. 68, 868 (1946)) (6.90 g; 30 mmols), cis-2-butene-1,4-diol (90 ml), citric acid (0.60 g; 2.9 mmols) and hydroquinone (0.30 g; 2.7 mmols) are reacted at 70° C. for 12 hours under reduced pressure (0.15 mm Hg) by distillating off slowly 120 ml of liquid which is replaced, time by time, with cis-2-butene-1,4-diol (120 ml). The reaction mixture is cooled and sodium methoxide (0.20 g) is added. The reaction mixture is poured into a 10% aqueous solution of sodium bicarbonate (300 ml) and extracted with ethyl ether (3×90 ml).

Herkunft & Nachweise