2-Nitrobenzenesulfonyl chloride → HCID 131733848, compound

Participants

Reaction Steps

To a solution of benzyl ((2R,3S)-2-((4-(aminomethyl)-5-(((tert-butyldiphenylsilyl)oxy)methyl)-2H-1,2,3-triazol-2-yl)methyl)-1-(2,4-dimethoxybenzyl)-4-oxoazetidin-3-yl)carbamate (234 mg, 0.312 mmol) in DCM (3.1 mL) at 0° C. was added 2-nitrobenzene-1-sulfonyl chloride (77.2 mg, 0.338 mmol) followed by TEA (87 μL, 0.62 mmol). After 2.2 h of stirring at rt, it was diluted with DCM and washed with KHSO4 (2%, aq). The aqueous layer was extracted with DCM (3×) and the combined organic layers were washed with brine, dried over Na2SO4 and concd in vacuo. The crude residue was purified via silica gel chromatography (EtOAc-Heptane, 0-60%), affording the title compound (252 mg, 87%) as an off-white solid. Rt=1.24 min, m/z=934.4 (M+1) Method 2m_acidic.

Provenance & Evidence