反应详情

3-Hydroxy-1,2-dimethylpyridin-4(1H)-one (0.5 g, 3.6 mmol) was reacted with benzenesulfonyl chloride (0.51 mL, 4.0 mmol) in 40 mL of pyridine to afford PZBG-3a in 43% yield (0.43 g, 1.5 mmol). 1H NMR (500 MHz, CDCl3) δ=8.19 (d, J=6.9 Hz, 2H), 7.66 (t, J=7.5 Hz, 1H), 7.57 (t, J=7.5 Hz, 2H), 7.23 (d, J=8 Hz, 1H), 6.34 (d, J=8.1 Hz, 1H), 3.63 (s, 3H, NCH3), 2.49 (s, 3H, CH3). 13C NMR (100 MHz, CDCl3) δ=171.3, 144.8, 140.7, 139.9, 137.3, 134.3, 129.0, 128.9, 118.3, 41.8, 14.7. ESI-MS(+): m/z 280.09 [M+H]+.

1. customto afford PZBG-3a in 43% yield (0.43 g, 1.5 mmol)