2,4,6-trichloropyrimidine. Reaction with anilines
作者:Jennifer M. Schomaker、Thomas J. Delia
DOI:10.1002/jhet.5570370609
日期:2000.11
The reaction of 2,4,6-trichloropyrimidine 1 with a variety of 4-substituted anilines 2 has been investigated. Monosubstitution occurs readily for all anilines except those containing strongly electron-withdrawing groups. The yields of the isomeric products 3 and 4 parallel the Hammet constants of the ring substituents. The main product when ethanol was used as the solvent was the 4-substituted-2,6-dichloropyrimidine
已经研究了2,4,6-三氯嘧啶1与各种4-取代的苯胺2的反应。除含有强吸电子基团的苯胺外,所有苯胺都容易发生单取代。异构体产物3和4的产率平行于环取代基的哈米特常数。当使用乙醇作为溶剂时的主要产物是4-取代的2,6-二氯嘧啶3。光谱和X射线数据证实了这种归属。但是,证明了溶剂对3:4比例的依赖性。在某些情况下,在强迫条件下过量的苯胺会生成2,4-二取代的产物。