1,1'-Carbonyldiimidazole → benzhydryl 1-[(Z)-[1-[2-[(2-methylpropan-2-yl)oxycarbonylamino]-1,3-thiazol-4-yl]-2-oxo-2-[[(3S,4R)-2-oxo-4-[(2-oxoimidazolidin-1-yl)methyl]azetidin-3-yl]amino]ethylidene]amino]oxycyclopropane-1-carboxylate

Participants

Reaction Steps

To a solution of benzhydryl 1-(((Z)-(2-(((2R,3S)-2-(((2-aminoethyl)amino)methyl)-4-oxoazetidin-3-yl)amino)-1-(2-((tert-butoxycarbonyl)amino)thiazol-4-yl)-2-oxoethylidene)amino)oxy)cyclopropanecarboxylate (90 mg, 0.133 mmol) in chloroform (2.7 mL) was added CDI (43.1 mg, 0.266 mmol) and TEA (111 μl, 0.797 mmol). After 12 h, the reaction mixture was concentrated in vacuo. The crude residue was purified via silica gel chromatography (MeOH-DCM, 0-100%) to afford the title compound (46 mg, 49%). LCMS: Rt=0.95 min, m/z=704.0 (M+1), Method 2m_acidic.

Provenance & Evidence