Synthesis 2022; 54(16): 3605-3612
DOI: 10.1055/a-1807-3188
paper

Flow Hydrogenation of 1,3,5-Trinitrobenzenes over Cu-Based Catalysts as an Efficient Approach for the Preparation of Phloroglucinol Derivatives

a   Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave. 5, Novosibirsk 630090, Russian Federation
,
Irina А. Shchurova
b   Institute for Problems of Chemical and Energetic Technologies SB RAS, Sotsialisticheskaja str. 1, Biysk 659322, Russian Federation
,
Marina V. Bukhtiyarova
a   Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave. 5, Novosibirsk 630090, Russian Federation
,
Olga A. Bulavchenko
a   Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave. 5, Novosibirsk 630090, Russian Federation
,
Natalia A. Alekseyeva
b   Institute for Problems of Chemical and Energetic Technologies SB RAS, Sotsialisticheskaja str. 1, Biysk 659322, Russian Federation
,
Sergey V. Sysolyatin
b   Institute for Problems of Chemical and Energetic Technologies SB RAS, Sotsialisticheskaja str. 1, Biysk 659322, Russian Federation
,
Galina A. Bukhtiyarova
a   Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave. 5, Novosibirsk 630090, Russian Federation
› Author Affiliations
This work was supported by the Russian Science Foundation (grant no. 22-23-00127).


Abstract

An environmentally friendly and safe synthesis of phloroglucinol and its derivatives through the flow hydrogenation of 1,3,5-trinitrobenzenes on heterogeneous copper catalysts is reported. It was found that hydrogenation of 1,3,5-trinitrobenzene, 2,4,6-trinitrotoluene, 2,4,6-trinitroxylene, and 2,4,6-trinitromesitylene in methanol over Cu–Al mixed oxides derived from layered double hydroxides led to selective formation of the corresponding triaminobenzenes, which were isolated from the reaction mixture in the form of double salts with sulfuric acid and were stable in storage. Subsequent hydrolysis in aqueous solution gave the phloroglucinol derivatives in good yields (75–82%).

Supporting Information



Publication History

Received: 02 March 2022

Accepted after revision: 23 March 2022

Accepted Manuscript online:
23 March 2022

Article published online:
17 May 2022

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