Phosphorus oxychloride → HCID 20569883, compound

Participants

Reaction Steps

A solution of 7-bromo-1-oxy-benzo[1,2,4]triazin-3-ol (11 g, 46 mmol) in POCl3 (50 mL) was heated under reflux for 16 h, cooled to rt, poured into ice-water and stirred for 30 min. The mixture was filtered, washed with water and dried to afford 7-Bromo-3-chloro-benzo[1,2,4]triazine 1-oxide (5 g, 42%) as a yellow solid.

Provenance & Evidence