作者:Toni A. Lutz、Patrick Spanner、Klaus T. Wanner
DOI:10.1016/j.tet.2016.02.011
日期:2016.3
A general and practical synthetic method for the construction of unsymmetrically substituted diphenyldiazenes based on classical azo coupling reaction has been developed. A key feature of this method is the use of N,N-diallyl protected aniline derivatives as coupling components. The N,N-diallyl moiety of the coupling component warrants sufficient reactivity and allows to avoid formation of constitutional
已开发出一种基于经典偶氮偶合反应的不对称取代的二苯基二氮杂烯的通用合成方法。该方法的关键特征是使用N,N-二烯丙基保护的苯胺衍生物作为偶联组分。偶联组分的N,N-二烯丙基部分保证足够的反应性,并允许避免由中间三氮烯形成导致的结构异构体的形成。此外,在偶联反应之后,N,N-二烯丙基氨基官能团可以通过重氮离子中间体被包括氢在内的其他取代基取代。通常,采用这种方法可以以合理的收率获得目标化合物。