HCID 70416287, compound → HCID 53643713, compound

Participants

Reaction Steps

In a mixture of 1 ml of methanol and 1 ml of 1N aqueous sodium hydroxide solution is dissolved 30 mg of ethyl 3(R)-(1-ethoxycarbonyl-5-piperidinopentyl)amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetate.dihydrochloride as obtained in Example 79, and the solution is allowed to stand at room temperature for 1 hour. After methanol is evaporated off under reduced pressure, 2 ml of water and 0.5 ml of acetic acid are added to the residue, followed by purification by Amberlite XAD-2 column chromatography (acetone:water=2:1). The eluate is concentrated under reduced pressure, and the residue is lyophilized to give 17 mg of 3(R)-(1-carboxy-5-piperidinopentyl)amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetic acid as a colorless powder.

Provenance & Evidence