摘要
偶氮苯作为一种特殊的结构骨架在科学领域有重要而广泛的应用。偶氮化合物主要用于化工行业,如偶氮类染料。而且由于偶氮化合物在适当的光辐射下存在有效的顺反异构现象,所以这类化合物是制备分子开关器件的首选对象。合成偶氮化合物的经典方法有偶氮偶合反应(重氮盐与活化芳香族化合物的偶合),Mills反应(亚硝基与苯胺衍生物的反应)和Wallach反应(在酸性介质中将氧化偶氮苯转换成4-羟基取代偶氮苯衍生物)。近年来,其它的一些合成方法也有报道。本文综述了近期报道的关于偶氮苯的合成方法包括最新报道的合成方法以及它们的反应机理。
Azobenzenes are ubiquitous motifs which are very important in many areas of science. Azo compounds display crucial properties for important applications, mainly for the chemical industry as dyes. These compounds are excellent candidates as molecular switches because of their efficient cis - trans isomeri- zation in the presence of appropriate radiation. The classical methods for the synthesis of azo compounds are the azo coupling reaction （ coupling of diazonium salts with activated aromatic compounds）, the Mills reac- tion （reaction between aromatic nitroso derivatives and anilines） and the WaUach reaction （transformation of azoxybenzenes into 4-hydroxy substituted azoderivatives in acid media）. More recently, other preparative methods have been reported. This review covers the various synthetic methods reported on azo compounds with special emphasis on the more recent ones and their mechanistic aspects.
出处
《云南化工》
CAS
2013年第1期24-29,共6页
Yunnan Chemical Technology
基金
国家自然科学基金(No.21074105
21274119)
云南省基金(2010CD018)
国家科技支撑项目(2012BAE06B00)
关键词
偶氮苯合成
重氮盐
偶氮偶合
Synthesis of azobenzenes
diazonium salts
azo coupling
