Hydrochloric Acid → 4-{[4-({(tert-butoxycarbonyl)[(1R)-1-(1-naphthyl)ethyl]amino}methyl)-3-phenylpiperidin-1-yl]carbonyl}benzoic acid

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Reaction Steps

To 55 mg of methyl 4-{[4-({(tert-butoxycarbonyl)[(1R)-1-(1-naphthyl)ethyl]amino}methyl)-3-phenylpiperidin-1-yl]carbonyl}benzoate were added 2.0 mL of THF, 1.0 mL of methanol, and 1.00 mL of a 1 M aqueous sodium hydroxide solution, followed by stirring at room temperature overnight. It was neutralized by addition of 1.1 mL of 1 M hydrochloric acid, and then extracted with chloroform, and the organic layer was dried over anhydrous sodium sulfate. After filtration, the filtrate was concentrated under reduced pressure, and dried to obtain 4-{[4-({(tert-butoxycarbonyl)[(1R)-1-(1-naphthyl)ethyl]amino}methyl)-3-phenylpiperidin-1-yl]carbonyl}benzoic acid as a crude product(colorless foamy substance, 57.5 mg).

Provenance & Evidence