Trifluoroacetic acid → HCID 118379760, compound

Participants

Reaction Steps

Followed the general procedure for the acid mediated deprotection using (2R,3S)-3-((Z)-2-(((1-(tert-butoxy)-2-methyl-1-oxopropan-2-yl)oxy)imino)-2-(2-((tert-butoxycarbonyl)amino)thiazol-4-yl)acetamido)-2-((4-(tert-butoxycarbonyl)-1H-1,2,3-triazol-1-yl)methyl)-4-oxoazetidine-1-sulfonic acid (180 mg, 0.237 mmol), DCM (8 mL) and TFA (2 mL, 26 mmol). The crude residue was purified by reverse phase prep HPLC (T3, 30×150 mm, 5 μm, C18 column; ACN-water with 0.1% formic acid modifier, 1 mL/min), affording the title compound (35 mg, 27%) as a white solid. LCMS: m/z=544.9 (M−1); 1H NMR (400 MHz, D2O): δ 8.43 (s, 1H), 6.99 (s, 1H), 5.38 (d, J=5.2 Hz, 1H), 4.92-4.71 (m, 3H; partially obscured by solvent residual peak), 1.33 (s, 6H).

Provenance & Evidence