Nitronium tetrafluoroborate → 2-Bromo-3,4-dimethoxy-6-nitrobenzonitrile

Participants

Reaction Steps

To a stirred solution of 2-bromo-3,4-dimethoxybenzonitrile (prepared according to step (b), 5.77 g, 23.8 mmol) in acetonitrile (58 ml) at 0° C. was added nitronium tetrafluoroborate (5.67 g, 42.9 mmol) portionwise ensuring that the temperature did not rise above 10° C. After stirring for 4 hours in the range 0° C. to 10° C., the reaction was cautiously quenched into 10% aqueous NaHCO3 (66 ml). The resulting suspension was filtered and the solid dried in vacuo overnight to give 5.83 g of the subtitle product (85%).

Provenance & Evidence