反应详情

To a solution of 1-(((Z)-(2-(((2R,3S)-2-((4-(aminomethyl)-2H-1,2,3-triazol-2-yl)methyl)-4-oxo-1-sulfoazetidin-3-yl)amino)-1-(2-aminothiazol-4-yl)-2-oxoethylidene)amino)oxy)-cyclopropanecarboxylic acid (582 mg, 1.10 mmol) in DMF (12 mL) at 0° C. was added pyrazole-1-carboxamidine hydrochloride (322 mg, 2.20 mmol) and DIPEA (1.54 mL, 8.80 mmol). After 16 h of stirring at rt, the solution was diluted with toluene (60 mL), causing a dense oil to separate out. The top layer was decanted and the remaining oil was 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 (240 mg, 37%) as an off-white powder. LCMS: Rt=0.31 min, m/z=572.2 (M+H) Method 2m_acidic; 1H NMR (400 MHz, D2O) δ 7.59 (s, 1H), 6.99 (br s, 1H), 5.43 (d, J=5.5 Hz, 1H), 4.91-4.75 (m, 2H assumed; obscured by solvent residual peak), 4.70 (dd, J=8.2, 6.3 Hz, 1H), 4.41-4.34 (m, 2H), 1.20 (br s, 2H), 1.05 (br s, 2H). E-isomer was also obtained. LCMS: Rt=0.33 min, m/z=572.2 (M+H) Method 2m_acidic; 1H NMR (400 MHz, D2O) δ 7.58 (s, 1H), 7.46 (br. s., 1H), 5.45 (br. s., 1H), 4.84 (s, 3H), 4.37 (s, 2H), 1.33-1.08 (m, 4H).

1. customto separate out
2. customThe top layer was decanted
3. customthe remaining oil was 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)