Method for synthesizing 1,5-diaminonaphthalene in one step by naphthalene

Abstract

The invention discloses a method for synthesizing 1,5-diaminonaphthalene by one step with naphthalene. The method is characterized in that in a mixed solvent of glacial acetic acid and water, naphthalene and hydroxylammonium salts carry out one-step reaction in the presence of catalysts, namely metavanadate and / or vanadium oxide, to generate 1,5-diaminonaphthalene. The method is low in cost, simple in process, short in flow and mild in reaction conditions, is environment-friendly and meets the industrial production requirements.

Description

technical field

[0001] The invention relates to a method for one-step synthesis of 1,5-diaminonaphthalene from naphthalene, which belongs to the field of organic synthesis. Background technique

[0002] 1,5-diaminonaphthalene, also known as 1,5-naphthalene diamine, is an extremely important organic raw material, widely used in pharmaceuticals, agricultural chemicals, dyes, surfactants, rubber additives, resins, photosensitive materials Production, especially for the synthesis of 1,5-naphthalene diisocyanate, and then the preparation of polyurethane. Polyurethane is widely used in many fields such as light industry, chemical industry, electronics, textile, medical treatment, construction, building materials, national defense, aerospace, aviation, etc., and the development prospect is very broad. The demand for intermediate raw materials such as 1,5-naphthalene diamine bigger.

[0003] The existing synthesis methods of 1,5-diaminonaphthalene mainly include naphthalene nitrat...

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