Trifluoroacetic acid → HCID 118379702, 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-((3-methyl-1H-1,2,4-triazol-1-yl)methyl)-4-oxoazetidine-1-sulfonic acid (100 mg, 0.149 mmol), DCM (4.0 mL) and TFA (1.0 mL, 13.0 mmol) for 3 h. The crude residue 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 (50 mg, 65%) as a white powder. LCMS: m/z=514.7 (M−1); 1H NMR (400 MHz, DMSO-d6) δ 9.40 (d, J=8.4 Hz, 1H), 8.72 (br s, 1H), 6.78 (s, 1H), 5.25 (dd, J=8.8, 5.6 Hz, 1H), 4.61 (dd, J=14.4, 5.2 Hz, 1H), 4.47 (dd, J=14.4, 6.0 Hz, 1H), 4.33 (dd, J=6.0, 5.2 Hz, 1H), 2.30 (s, 3H), 1.42 (s, 3H), 1.38 (s, 3H).

Provenance & Evidence