1-BROMO-2-CHLORO-4-FLUOROBENZENE AND PRODUCTION THEREOF

摘要

NEW MATERIAL:The titled compound expressed by the formula. USE:An intermediate for producing herbicides (tetrahydrophthalimide derivatives). PREPARATION:2-Chloro-4-fluoroaniline is diazotized with sodium nitrite, potassium nitrite, etc., as a diazotizing agent at -5-+5 deg.C for 0.5-3hr and then brominated with cuprous promide, etc., in an aqueous solution of hydrobromic acid, etc., at 20-70 deg.C for 1-5hr to afford the aimed compound expressed by the formula.