Trifluoroacetic acid → HCID 118379818, compound

Participants

Reaction Steps

Followed the general procedure for the acid mediated deprotection using (3S,4R)-3-((Z)-2-((1-((benzhydryloxy)carbonyl)cyclopropoxy)imino)-2-(2-((tert-butoxycarbonyl)amino)thiazol-4-yl)acetamido)-2-oxo-4-((2-oxoimidazolidin-1-yl)methyl)azetidine-1-sulfonic acid, (3S,4R)-3-((Z)-2-((1-((benzhydryloxy)carbonyl)cyclopropoxy)imino)-2-(2-((tert-butoxycarbonyl)amino)thiazol-4-yl)acetamido)-2-oxo-4-((3-oxo-1,2,4-triazinan-1-yl)methyl)azetidine-1-sulfonic acid (48 mg, 61 μmol), DCM (0.61 mL), and TFA (0.28 mL, 3.7 mmol) for 4 h. The crude residue was purified by reverse phase prep HPLC (XSelect CSH, 30×100 mm, 5 μm, C18 column; AcN-water with 0.1% formic acid modifier, 60 mL/min) affording the title compound (3.6 mg, 10%). LCMS: Rt=0.45 min, m/z=518.1 (M+1), Method 2m_acidic; 1H NMR (500 MHz, D2O): δ 7.01 (s, 1H), 5.32 (d, J=5.5 Hz, 1H), 4.53-4.39 (m, 1H), 3.61 (dd, J=14.8, 6.9 Hz, 1H), 3.56-3.41 (m, 2H), 3.35-3.21 (m, 3H), 1.46-1.19 (m, 4H).

Provenance & Evidence