Trifluoroacetic acid → HCID 118379828, compound

Participants

Reaction Steps

Followed the general procedure for the acid mediated deprotection using (3S,4R)-3-((Z)-2-((2-(tert-butoxy)-2-oxoethoxy)imino)-2-(2-((tert-butoxycarbonyl)amino)thiazol-4-yl)acetamido)-2-oxo-4-((2-oxooxazolidin-3-yl)methyl)azetidine-1-sulfonic acid (135 mg, 0.208 mmol), DCM (1.04 mL) and TFA (801 μl, 10.4 mmol). The crude residue purified by reverse phase prep HPLC (XSelect CSH, 19×100 mm, 5 μm, C18 column; ACN-water with 0.1% formic acid modifier, 24 mL/min), affording the title compound (25 mg, 23%) as a white powder. LCMS: Rt=0.25 min, m/z=493.0 (M+1) Method 2m_acidic; 1H NMR (500 MHz, DMSO-d6) δ 9.41 (d, J=9.1 Hz, 1H) 6.86 (s, 1H) 5.24 (dd, J=9.0, 5.8 Hz, 1H) 4.62 (s, 2H) 4.20-4.11 (m, 3H) 3.72-3.63 (m, 2H) 3.40-3.31 (m, 2H assumed; obscured by water).

Provenance & Evidence