Water → HCID 58355136, compound

Participants

Reaction Conditions

Reaction Steps

(3R,5S)-1-(tert-Butoxycarbonyl)-5-[{[5-(4-methoxybutyl)-1-phenyl-1H-1,2,3-triazol-4-yl]carbonyl}(2-methylpropyl)amino]piperidine-3-carboxylic acid (200 mg) was dissolved in toluene (5 ml), 5-methyl-1H-tetrazole (36 mg) and N,N′-dicyclohexylcarbodiimide (96 mg) were added and the mixture was stirred at 80° C. for 15 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure. The residue was subjected to silica gel column chromatography, and a fraction eluted with ethyl acetate-hexane (1:3-1:1) was concentrated under reduced pressure. The residue was dissolved in toluene (1 ml), trifluoroacetic acid (1 ml) was added and the mixture was stirred at room temperature for 1 hr. The reaction mixture was concentrated under reduced pressure, basified with saturated aqueous sodium hydrogen carbonate, and the mixture was extracted twice with ethyl acetate. The extract was dried over anhydrous sodium sulfate and the solvent was evaporated under reduced pressure. The residue was dissolved in methanol (1 ml), fumaric acid (12 mg) was added and the mixture was concentrated under reduced pressure to give the object product (85 mg).

Provenance & Evidence