Potassium Persulfate → HCID 118379429, compound

Participants

Reaction Conditions

Reaction Steps

Slurried tert-butyl 2-(((2R,3S)-3-(((benzyloxy)carbonyl)amino)-1-(2,4-dimethoxybenzyl)-4-oxoazetidin-2-yl)methyl)-4,6-dihydropyrrolo[3,4-d][1,2,3]triazole-5(2H)-carboxylate (85.5 mg, 0.144 mmol), potassium peroxydisulfate (51.8 mg, 0.186 mmol) and potassium phosphate, dibasic (57 mg, 0.33 mmol) in ACN/water (2 mL, 2:1) for 5 min, then heated to 90° C. for 1.5 h. More potassium peroxydisulfate (13.9 mg, 0.050 mmol) was added and it was heated for an additional hour. More potassium peroxydisulfate (12.1 mg, 0.043 mmol) was added and it was heated an additional hour, whereupon the slurry was partially concentrated in vacuo then partitioned between saturated NaHCO3 (aq) and EtOAc. After separating the layers, the aqueous was extracted with EtOAc (3×). The combined organic layers were washed with brine, dried over Na2SO4 and concentrated in vacuo. The crude residue was purified via silica gel chromatography (EtOAc-Heptane, 0-100%) to afford contaminated product (33 mg), which was repurified by reverse phase HPLC (XSELECT CSH, C18, 5μ, 30×100 mm, ACN/H2O with 0.1% formic acid buffer, 60 mL/min). The title compound (12.1 mg, 19%) was obtained as a white solid. Rt=0.78 min, m/z=433.2 (M+1) Method 2m_acidic. 1H NMR (500 MHz, DMSO-d6) δ 8.40 (s, 1H), 8.17 (d, J=9.7 Hz, 1H), 7.42-7.26 (m, 5H), 5.05 (s, 2H), 5.04-4.99 (m, 1H), 4.58 (d, J=6.6 Hz, 2H), 4.40 (d, J=4.7 Hz, 4H), 4.22 (q, J=6.5 Hz, 1H), 1.45 (s, 9H).

Provenance & Evidence