[EN] METHOD OF MAKING SUBSTITUTED DIHALO AROMATIC ACID CHLORIDES<br/>[FR] PROCEDE DE FABRICATION DE CHLORURES D'ACIDES DIHALO AROMATIQUES SUBSTITUES
申请人:OCCIDENTAL CHEM CO
公开号:WO2001083420A2
公开(公告)日:2001-11-08
A three-step method of making a substituted dihalo aromatic acid chloride is disclosed. A substituted aromatic compound having the general formula is halogenated to produce a mixture of corresponding dihalo and trihalo aromatic compounds, where R is COOH or COOR', R' is alkyl from C1 to C6, each R1 is independently selected from alkyl or alkoxy from C1 to C6 with no more than a single R1 group in the ortho position, and n is 1 or 2. Ortho halogens are selectively dehalogenated to produce the corresponding monohalo and dihalo aromatic compounds. The dihalo aromatic compound is converted into the corresponding acid chloride.