反应Ñ -aryliminophosphoranes与1-(杂)中在约预热二苯醚芳酰基-2- aryldiazenes 在大多数情况下,在150–250°C下进行5–25分钟,可以得到中等至良好的1,3-二芳基-1,4-二氢苯并[ e ] [1,2,4]三嗪4基(又名Blatter自由基)产量。所有新化合物均经过充分表征,包括对基团的EPR和CV研究。还提出了1-苯甲酰基-2-(全氟苯基)二氮杂和1-(全氟苯基)-3-苯基-1,4-二氢苯并[ e ] [1,2,4]三嗪基的单晶X射线结构。
Route to Benzo- and Pyrido-Fused 1,2,4-Triazinyl Radicals via <i>N</i>′-(Het)aryl-<i>N</i>′-[2-nitro(het)aryl]hydrazides
作者:Andrey A. Berezin、Georgia Zissimou、Christos P. Constantinides、Yassine Beldjoudi、Jeremy M. Rawson、Panayiotis A. Koutentis
DOI:10.1021/jo402481t
日期:2014.1.3
involves the N′-(2-nitroarylation) of easily prepared N′-(het)arylhydrazides via nucleophilic aromatic substitution of 1-halo-2-nitroarenes, which in most cases gives N′-(het)aryl-N′-[2-nitro(het)aryl]hydrazides in good yields. Mild reduction of the nitro group followed by an acid-mediated cyclodehydration gives the fused triazines, which upon alkali treatment afford the desired radicals. Fifteen examples
A series of 3-substituted 1-phenyl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yls 1 was prepared by addition of PhLi to 3-substitutedbenzo[e][1,2,4]triazines 2 followed by aerial oxidation. The scope of the C(3) substituents in the reaction was investigated, and 10 structurally diverse radicals 1 were isolated, their stability was assessed and properties were investigated with spectroscopic and electrochemical