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Studies on the Selenium-catalyzed Reduction of Aromatic Nitro Compounds with CO/H2O

Author: LiuXiaoZhi
Tutor: LuShiWei
School: Dalian Institute of Chemical Physics
Course: Organic Chemistry
Keywords: Selenium-Catalyzed Aromatic Nitro Compounds Carbon monoxide Reduction Aromatic amines
CLC: O643.3
Type: PhD thesis
Year: 2004
Downloads: 205
Quote: 1
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Abstract


This article aims to explore a catalytic method is advanced and creative use of carbon monoxide in the selective reduction of aromatic nitro compounds under mild conditions to the preparation of aromatic amines . The catalytic process including the catalyst system and the reaction system, and selection and matching of a variety of conditions can be significantly modulated catalytic activity and selectivity . Whereby we reached the expected goal , found the polar aprotic solvent is selected to moderate-intensity inorganic base as cocatalyst , cheap and easy to get selenium as a catalyst for carbon monoxide / water as a reducing agent , at atmospheric pressure conditions under corresponding lower temperatures can be achieved to the high selectivity of the dinitro aromatic compound reduced to single nitro aromatic amine , especially the single nitro aromatic compound and mononitro fused ring aromatic compound can be quantitatively converted to the corresponding aryl amines. And systematic study of the law of the reduction reaction of aromatic nitro compounds . The selenium catalyzed CO / H 2 O reduction mechanism of aromatic nitro compounds some superficial understanding on the basis of the experimental . In this catalytic reaction , the carbon monoxide partial pressure is large , the reactive species Selenium mainly is carbonyl , with the carbon monoxide partial pressure decreases gradually converted to hydrogen selenide - based . In the the atmospheric reduction reaction process , the generation of catalytically active species is a critical step of the reaction . The nitro compound and the concentration of water is key to the nitro reduction reaction or carbonylation reaction . The selenium catalyzed CO / H 2 O reduction of aromatic nitro compound with a reaction control transfer characteristics .

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic
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