Hydrochloric Acid → HCID 70099518, compound

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Reaction Steps

In a 100 mL flask equipped with magnetic stirrer, O-carbamoyl-N-(t-butyloxycarbonyl)-o-fluorophenylalaninol obtained in Example I was dissolved in 40 ml of THF and was added with 20 ml of 6N aqueous hydrochloric acid solution. The reaction mixture was stirred at room temperature for 8 hours, followed by the neutralization with saturated aqueous potassium carbonate solution. Thereafter, the organic layer was extracted 3 times with dichloromethane, dried over magnesium sulfate and distilled in vacuo, to give a yellowish liquid. This, was dissolved in 30 ml of THF and added with anhydrous hydrochloric acid at 0° C., to obtain desirable white precipitates. To this was added 30 ml of anhydrous ether, with the aim of maximizing the precipitation. As a result, 1.22 g of the title compound was obtained: Yield 73%.

Provenance & Evidence