反应详情

A solution of 2-bromo-4-chloroaniline (10.0 g, 48.4 mmol) and HBF4 in EtOH (60 mL) kept at 0° C. was treated with an aqueous solution (20 mL) of NaNO2 (3.34g, 48.4 mmol). After completion of the addition, diethyl ether (200 mL) was added to the mixture. The solid was collected by filtration, washed with water and dried under high vacuum affording the title compound (14.2 g, 96%) as white crystals.

1. customkept at 0° C.
2. additionwas added to the mixture
3. filtrationThe solid was collected by filtration
4. washwashed with water
5. customdried under high vacuum