Method for synthesizing 1-amino naphthalenes

Abstract

A process for synthesizing amino naphthalene by nitro naphthalene with carbon monoxide and water, selenium as catalyst, organic alkali and inorganic alkali as assistant catalyst in organic solvent, the molar ratio of nitro naphthalene and water is 1:1 to 1:1000, the molar amount of selenium is 0.1-100% of the molar amount of nitro naphthalene; the molar amount of organic alkali and inorganic alkali is 1-36 hours; reaction temperature is 20-120 deg.C.

Description

technical field [0001] The invention relates to the synthesis of 1-aminonaphthalene, in particular to a method for synthesizing 1-aminonaphthalene by utilizing carbon monoxide and water through selenium catalytic reduction. Background technique [0002] As an important organic synthesis intermediate and raw material, 1-aminonaphthalene is widely used in the fields of medicine, pesticide, dyestuff, auxiliary agent and so on. At present, 1-aminonaphthalene is obtained through the reduction of 1-nitronaphthalene, and the number of relevant documents is huge. The reduction methods of nitro compounds used in industrialization mainly include the following: iron filings reduction, alkali sulfide reduction, electrolysis Reduction and catalytic hydrogenation reduction. Although the iron filings method and the soda sulfide method have wide adaptability, simple process, and reasonable technical economy, they are seriously polluted to the environment and have been gradually eliminated;...

AI Technical Summary

Problems solved by technology

Although the iron filings method and the soda sulfide method have wide adaptability, simple process, and reasonable technical economy, they are seriously polluted to the environment and have been gradually eliminated; the electrolysis method has high yield, easy operation, and environmental friendliness, but it consumes a lot of energy and is now widely used. In laboratory synthesis and semi-industrial production; catalytic hydrogenation method has large output and high product quality, and has obvious advantages in solving environmental pollution problems. Therefore, this method has become the mainstream in industry, but this method requires the use of more expensive catalysts and hydrogen, the cost is high and the operation is more complicated

In addition, there are reduction methods using hydrazine under the action of catalysts and metal hydride reduction methods, but they are only suitable for the reduction of special aromatic nitro compounds, and the cost is high, so they are not universal

Images