An unusual reduction route of 2,4,6-trinitrobenzoic acid under conditions of aqueous-phase hydrogenation over Pd/Sibunit catalyst
作者:R. M. Mironenko、O. B. Belskaya、V. P. Talzi、V. A. Rodionov、S. V. Sysolyatin、V. A. Likholobov
DOI:10.1007/s11172-016-1479-8
日期:2016.6
For the first time it was established that the catalytic hydrogenation of 2,4,6-trinitrobenzoic acid to 1,3,5-triaminobenzene can proceed via the formation of aromatic hydroxyamines and cyclohexane-1,3,5-trione trioxime. As a result of aqueous-phase hydrogenation of sodium salt of 2,4,6-trinitrobenzoic acid in the presence of 5%Pd/Sibunit catalyst at a temperature of 323 K and pressure of 0.5 MPa, a trioxime in high yield (about 70 %) was obtained. Due to high selectivity to cyclohexane-1,3,5-trione trioxime the catalytic hydrogenation of sodium salt of 2,4,6-trinitrobenzoic acid can be considered as a new method for its synthesis.
首次证实了 2,4,6-三硝基苯甲酸催化加氢生成 1,3,5-三氨基苯时可通过形成芳香族羟胺和环己烷-1,3,5-三酮三肟进行。在温度为 323 K、压力为 0.5 MPa 的条件下,在 5%Pd/Sibunit 催化剂存在下,对 2,4,6-三硝基苯甲酸钠盐进行水相氢化,可获得高产率(约 70%)的三肟。由于对环己烷-1,3,5-三酮三肟的高选择性,2,4,6-三硝基苯甲酸钠盐的催化加氢可被视为一种新的合成方法。