Triethylamine → (3R*,4R*)-3-{[Cyclopropyl-(pyrrolidine-1-carbonyl)-amino]-methyl}-4-({isopropyl-[4-methoxy-3-(3-methoxy-propoxy)-benzoyl]-amino}-methyl)-pyrrolidine-1-carboxylic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

Triethylamine (99 μL, 0.714 mmol) followed by 1-pyrrolidinecarbonyl chloride is added to a solution of ((3R*,4R*)-3-cyclopropylaminomethyl-4-({isopropyl-[4-methoxy-3-(3-methoxy-propoxy)-benzoyl]-amino}-methyl)-pyrrolidine-1-carboxylic acid tert-butyl ester (254 mg, 0.476 mmol) in CH2Cl2 (20 mL). The resulting solution is stirred at RT for 2 h and at 60° C. for another 24 h. Evaporation of the solvent affords the crude product which is purified by preparative HPLC (Waters C18 ODB, eluent: H2O/CH3CN 20 to 100%) to give the title compound. MS (LC-MS): 631.1 [M+H]+; tR (HPLC, Macherey-Nagel Nucleosil C18 column, 10-100% CH3CN/H2O/5 min, 100% CH3CN/3 min, CH3CN and H2O containing 0.1% TFA, flow: 1.5 ml/min): 6.31 min.

Provenance & Evidence