反应详情

To a suspension of 2-chloro-4-fluorophenyl methyl carbonate (110 g, 0.54 mol) in conc. H2SO4 (50 mL) was slowly added a mixture comprised of cone. H2SO4 (40 mL) and fuming HNO3 (40.8 mL, 0.89 mol). The resultant mixture was stirred for 30 min at 0° C. The reaction mixture was poured into ice water and the precipitated solid was collected by filtation and washed with water to give 2-chloro-4-fluoro-5-nitrophenyl methyl carbonate (120 g, 90% yield). 1H NMR (400 MHz, DMSO-d6): δ 8.45 (d, J=7.2 Hz, 1H), 8.12 (d, J=10.8 Hz, 1H), 3.89 (s, 3H); MS (ESI) m/z: 250.1 (MAI).

1. additionwas slowly added a mixture
2. customthe precipitated solid was collected by filtation
3. washwashed with water