Potassium bisulfate → (S)-tert-butyl 1-oxohexan-2-ylcarbamate

Participants

Reaction Conditions

Reaction Steps

A mechanically stirred suspension of lithium aluminum hydride (5.00 g, 0.131 mol) in ether (250 mL) was cooled to −45“C under nitrogen. A solution of the product from Step A (28.3 g, 0.103 mol) in ether (125 mL) was added, maintaining the temperature below −35° C. when the addition was complete, the reaction was warmed to 5° C., then recooled to −45° C. A solution of potassium hydrogen sulfate (27.3 g, 0.200 mol) in water was slowly added, maintaining the temperature below −5° C. After quenching, the reaction was stirred at room temperature for 1 h. The mixture was filtered through Celite, the ether evaporated, and the remainder partitioned between ethyl acetate and 2% potassium hydrogen sulfate. After washing with saturated brine, drying over magnesium sulfate and solvent removal, the title compound was obtained.

Provenance & Evidence