Hydrochloric Acid → HCID 9914513, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of crude N-benzyloxycarbonyl-O-(4-(2-(2-phenyloxazol-4-yl)ethoxy)phenyl)methyl-L-serine methyl ester (13.32 g, 25.1 mmol) in 133 mL of tetrahydrofuran at 2° C. was added 44 mL of deionized water. A solution of lithium hydroxide (1.2 g, 50.2 mmol) in 40 mL of deionized water was added slowly over 25 minutes keeping the temperature of the reaction below 4° C. After the addition was complete the reaction was allowed to stir at 2° C. for 1 hour. The pH of the mixture was adjusted to about 1 with 6N hydrochloric acid (8.3 mL). Water (130 mL) was added and the reaction was extracted with ethyl acetate (2×260 mL). The organic extracts were dried over magnesium sulfate, filtered, and the solvent removed to give an oil that was solvent exchanged into 125 mL of acetonitrile. The product crystallized and the slurry was stirred for about 1 hour at about 2° C. The precipitate was filtered using filtrete and rinsed with cold acetonitrile to give 7.65 g of the title compound.

Provenance & Evidence