Process for the preparation of meta-substituted...

Details Process for the preparation of meta-substituted... Process for the preparation of meta-substituted...

C - Chemistry, Metallurgy

07

C

260/616

C07C 39/24 (2006.01) C07C 37/00 (2006.01)

Patent

CA 1059148

PROCESS FOR THE PREPARATION OF META-SUBSTITUTED HALOGENO-PHENOLS ABSTRACT OF THE DISCLOSURE Phenols, meta-substituted by halogen are prepared by reacting halogenophenols of the formula Image wherein X1 and X2 are identical or different and represent halogen, hydrogen or optionally substituted aryl or aralkyl, with at least one of the radicals X1 or X representing halogen, and R1, R2 and R3 are identical or different and represent hydrogen or optionally monosubstituted or polysubstituted aryl or aralkyl or chlorine, bromine or iodine, with at least one of the radicals R1, R2 and R3 representing chlorine, bromine or iodine, with hydrogen under pressure at elevated temperature in the presence of elemental sulfur, or compounds thereof optionally in the presence of active charcoal and/or iron salts.

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