Diisopropylethylamine → HCID 66744719, compound

Participants

Reaction Steps

To a solution of 2-[5-[bis(tert-butoxycarbonyl)amino]-6-[5-[4-[[tert-butoxycarbonyl(methyl)amino]methyl]phenyl]-1,3,4-oxadiazol-2-yl]pyrazin-2-yl]cyclopropanecarboxylic acid (100 mg, 0.15 mmol) and tert-butyl N-[(3R)-pyrrolidin-3-yl]carbamate (31 mg, 0.17 mmol) in DMF (0.6 mL) at room temperature was added HATU (57 mg, 0.15 mmol) followed by the addition of DIEA (48 mg, 65 μL, 0.37 mmol) and reaction mixture was stirred at room temperature overnight. The reaction mixture was diluted with EtOAc and washed with 1M HCl solution, and then with brine. The layers were separated and the organic layer was dried over Na2SO4, filtered and concentrated to obtain tert-butyl N-[[4-[5-[3-[bis(tert-butoxycarbonyl)amino]-6-[2-[(3R)-3-(tert-butoxycarbonylamino)pyrrolidine-1-carbonyl]cyclopropyl]pyrazin-2-yl]-1,3,4-oxadiazol-2-yl]phenyl]methyl]-N-methyl-carbamate, which was dissolved in of 50% TFA-DCM (1 mL) mixture and stirred for 25 minutes at room temperature. The reaction mixture was concentrated under reduced pressure. The crude material was dissolved in DMSO (1 mL), filtered and purified using reverse phase HPLC (10 to 99% MeOH in H2O with HCl modifier) to obtain [2-[5-amino-6-[5-[4-(methylaminomethyl)phenyl]-1,3,4-oxadiazol-2-yl]pyrazin-2-yl]cyclopropyl]-[(3R)-3-aminopyrrolidin-1-yl]methanone.

Provenance & Evidence