Dimethylformamide → HCID 54341310, compound

Participants

Reaction Steps

A mixture of 10 ml of N,N-dimethylformamide, 0.3 g of tert-butyl 3(R)-[1(S)-carboxy-3-phenylpropyl]amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetate obtained in Example 43, 0.5 g of sodium bicarbonate and 0.15 g of benzyl bromide is stirred at room temperature overnight. The mixture is diluted with water (100 ml) and extracted with ethyl acetate (200 ml). The extract is washed successively with 0.1N hydrochloric acid and water, dried over anhydrous magnesium sulfate and concentrated under reduced pressure to give 0.35 g of tert-butyl 3(R)-[1(S)-benzyloxycarbonyl-3-phenylpropyl]amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetate as a colorless oil.

Provenance & Evidence