An efficient palladium-catalyzedC–Hbond functionalization/ortho-monoacylation reaction of 3-aryl-1,2,4-benzotriazines with (hetero)aryl or alkyl aldehydes has been developed, which offers a facile and alternative strategy for direct modification and further diversification of 3-aryl-1,2,4-benzotriazines. Bioactive 1,2,4-benzotriazine has been employed as a novel directing group for the palladium-catalyzed
Copper-Catalyzed Domino Reaction of 2-Haloanilines with Hydrazides: A New Route for the Synthesis of Benzo[e][1,2,4]triazine Derivatives
作者:Guosheng Huang、Han Guo、Jin Liu、Xianxue Wang
DOI:10.1055/s-0031-1290615
日期:2012.4
A copper-catalyzed domino reaction for the synthesis of benzo[e][1,2,4]triazine derivatives has been developed using readily available substituted 2-haloanilines and hydrazides as the starting materials. The procedure of the present method is mild, facile, and efficient.
A Novel Synthesis of 3-Aryl-1,2,4-benzotriazines<i>via</i><i>N</i>-Phenylsulfonyl-<i>N</i>″-arylbenzamidrazones
作者:Suketaka Ito、Yumo Tanaka、Akikazu Kakehi
DOI:10.1246/bcsj.55.859
日期:1982.3
3-Aryl-1,2,4-benzotriazines were obtained in good yields by the mercury(II) oxide-oxidation of N-phenylsulfonyl-N″-arylbenzamidrazones prepared from N-(phenylsulfonyl)benzohydrazonoyl chlorides and anilines. From the synthetic viewpoint for benzotriazines, this method may be of high utility on account of the availability of starting materials and higher yields.
Reactivity of AllylSmBr/HMPA: Facile Synthesis of 3-Aryl-1,2,4-benzotriazines
作者:Ruifeng Yin、Liejin Zhou、Huili Liu、Hui Mao、Xin Lü、Xiaoxia Wang
DOI:10.1002/cjoc.201200989
日期:2013.1
3‐Aryl‐1,2,4‐benzotriazines were conveniently prepared in moderate to good yields from 1,l‐bis(benzotriazol‐1‐yl)methylarenes with allylsamarium bromide/hexamethylphosphramide (allylSmBr/HMPA). Preliminary results indicate that HMPA may enhance the reducing ability as well as prohibit the nucleophicility of allylSmBr, thus making allylSmBr/HMPA as a promising single‐electron transfer (SET) reagent
Construction of 3-aryl-1,2,4-benzotriazines via unprecedented rearrangement of bis(benzotriazol-1-yl)methylarenes
作者:Zhiyun Zhong、Ran Hong、Xiaoxia Wang
DOI:10.1016/j.tetlet.2010.10.093
日期:2010.12
3-Aryl-1,2,4-benzotriazines were formed unexpectedly by the treatment of 1,l-bis(benzotriazol-1-yl) methylarenes with allylsamarium bromide. A radical pathway was proposed involving steps, such as fragmentation, ring-opening, and cyclization. (C) 2010 Elsevier Ltd. All rights reserved.