Water → HCID 67725210, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 5 g of (2S)-2-(N,N-dibenzylamino)-5-amino-1,6-diphenyl-4-hexene-3-one in toluene (100 ml) was chilled with ice water. To the solution, 5 ml of pyridine and 5 ml of ethyl chloroformate were gradually added. The reaction mixture was stirred at 70° C. for 12 hours, and then chilled with ice water. 5 ml of water was added to the reaction mixture, and the mixture was held at the same temperature for 1 hour. The reaction mixture was then washed with 50 ml of water and 50 ml of a dilute solution of potassium hydrogensulfate, and further with water, dried over sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography using n-hexane-ethyl acetate (10:1) as an eluent, thereby obtaining 1.65 g (28.5%) of the title compound as pale yellow powder from the eluate.

Provenance & Evidence