Mandelic Acid → HCID 178488147, Verbindung

Beteiligte Stoffe

Reaktionsschritte

Omeprazole sodium (500 grams) was suspended in acetone (6.0 liters) and diethyl D-tartrate (280 grams), titanium (IV) isopropoxide (325 grams) and triethylamine (410 grams) were added sequentially at a temperature of 35-40° C. L (+) mandelic acid (207 grams) was then added and further stirred for 30-60 minutes. The separated solid was filtered, washed with acetone (500 ml) and suck dried under vacuum. The wet solid thus resulting was suspended in a mixture of dichloromethane (2.0 liters) and 5% sodium bicarbonate solution (2.0 liters) and stirred for 15-30 minutes. The dichloromethane layer was separated from the resulting solution and the solvent was distilled off up to substantial completion to get the title compound in residual mass. [Weight: 180 grams, Chiral Purity: 99.93% (S-Isomer)].

Herkunft & Nachweise