The oxidation of all 19 chlorophenols and unsubstituted phenol by cerium(IV) was studied in an acidic aqueous solution in order to carry out a systematic test of chlorine substituent effects on the reactivity. All reactions were found to show 2 ∶ 1 cerium(IV) ∶ phenol stoichiometry and a simple second-order rate equation. Rate constants did not correlate well with characteristic parameters such as
Process for the production of an aromatic hydrazo compound
申请人:TOYO INK MANUFACTURING CO., LTD.
公开号:EP0391606A1
公开(公告)日:1990-10-10
A process for the production of an aromatic hydrazo compound, which comprises carrying out catalytic reduction of an aromatic nitro compound with hydrogen in an alkali metal hydroxide aqueous solution in the presence of a noble metal catalyst at a high temperature under a high pressure, wherein the catalytic reduction is carried out by using, as a hydrogen-donating solvent, a cyclic hydrocarbon formed of 1 to 4 aromatic rings as a basic skeleton and having hydrogen atoms attached to at least two places of the aromatic ring(s).