| 摘要 |
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 X2 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. |
