Trifluoroacetic acid → HCID 118380125, compound

Participants

Reaction Steps

Followed the general procedure for the acid mediated deprotection using (2R,3S)-2-((1H-1,2,4-triazol-1-yl)methyl)-3-((Z)-2-(((1-(tert-butoxy)-2-methyl-1-oxopropan-2-yl)oxy)imino)-2-(2-((tert-butoxycarbonyl)amino)thiazol-4-yl)acetamido)-4-oxoazetidine-1-sulfonic acid (50.1 mg, 0.076 mmol), DCM (760 μL) and TFA (351 μl, 4.56 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 (14.8 mg, 34%) as a white powder. LCMS: Rt=0.31 min, m/z=503.1 (M+1) Method 2m_acidic; 1H NMR (500 MHz, DMSO-d6) δ 9.39 (d, J=8.83 Hz, 1H), 8.52 (s, 1H), 8.02 (s, 1H), 6.74 (s, 1H), 5.28 (dd, J=8.8, 5.4 Hz, 1H), 4.74-4.64 (m, 1H), 4.58 (d, J=6.9 Hz, 1H), 4.32 (d, J=5.7 Hz, 1H), 1.37 (s, 3H) 1.41 (s, 3H).

Provenance & Evidence