Synthesis method for dibenzoxazole compounds
A synthesis method and benzoxazole technology are applied in the synthesis field of bisbenzoxazole compounds, can solve the problems of long reaction time, unfavorable environment, large amount of alkali, etc., and achieve short reaction time, less three wastes and low cost Effect
Active Publication Date: 2011-01-05
SHENYANG RES INST OF CHEM IND +1
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Problems solved by technology
In order to overcome the disadvantages of long reaction time, large consumption of acid and alkali, and unfavorable environment when preparing bisbenzoxazole compounds in the prior art, the present invention proposes a new synthetic method of bisbenzoxazole compounds : Direct ring-closing condensation of aromatic dinitrile compound and substituted or unsubstituted o-aminophenol hydrochloride to prepare target product
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The invention discloses a synthesis method of a dibenzoxazole type compound. In organic sovlent, a closed-loop condensation reaction is directly carried out between an aromatic dinitrile compound and substituted or nonsubstituted o-aminophenol hydrochloride to synthesize the dibenzoxazole compound or compounds with different substituents, and the composite proportion of the compound can be regulated according to different raw material proportionings. The method has the advantages of smooth reaction process, short reaction time, high yield rate of products, low cost, little three wastes, environmental protection, etc. and better faciliates large-scale production. The product produced by the method can be applied to the fluorescent whiting of synthesized or natural polymeric materials.
Description
A kind of synthetic method of bisbenzoxazole compound Technical field The invention belongs to the field of organic synthesis, and specifically relates to a method for synthesizing bisbenzoxazole compounds. Background technique Usually the method of synthesizing bisbenzoxazole compounds is to use dicarboxylic acid or its acid chloride as raw material, and o-aminophenol compounds are condensed at high temperature to form symmetric compounds, or they are respectively condensed with o-aminophenol with different substituents through secondary condensation. Asymmetric compound. This preparation method has the disadvantages of harsh reaction conditions, low yield and low product purity. When a nitrile group-containing compound and o-aminophenol are used to prepare benzoxazole compounds, an imide ester reaction process is usually required. Although the reaction conditions are mild, the reaction time is long and consumes a large amount of acid, alkali and other chemical substances, ...
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IPC IPC(8): C07D263/57C07D413/14C07D263/00C07D333/00
Inventor 李文胜竹百均王景国徐会志刘月中钱之杨
Owner SHENYANG RES INST OF CHEM IND