Diisopropylethylamine → HCID 178454252, compound

Participants

Reaction Steps

To a solution of tert-butyl 3-((3-((2-(((2R,3S)-3-amino-4-oxoazetidin-2-yl)methyl)-2H-1,2,3-triazol-4-yl)methyl)-1,2-bis(tert-butoxycarbonyl)guanidino)methyl)azetidine-1-carboxylate (309 mg, 0.51 mmol) and (Z)-2-((1-((benzhydryloxy)carbonyl)cyclopropoxy)imino)-2-(2-((tert-butoxycarbonyl)amino)thiazol-4-yl)acetic acid (273 mg, 0.51 mmol) in DMF (6 mL, ratio: 1) and DCM (6 mL, ratio: 1) was added HATU (232 mg, 0.61 mmol) followed by DIPEA (0.22 mL, 1.27 mmol). After stirring at rt for 12 h, EtOAc was added to the reaction mixture and washed with water, brine, dried over Na2SO4, filtered and concentrated in vacuo. The crude residue was purified via silica gel chromatography (EtOAc-heptane, 0-95%) to afford the title compound (330 mg, 58%). LCMS: Rt=1.15 min, m/z=1127.8 (M+1) Method 2m_acidic.

Provenance & Evidence