Synthesis of 7-aryl/heteraryl-1,3-diphenyl-1,2,4-benzotriazinyls via palladium catalyzed Stille and Suzuki-Miyaura reactions
作者:Christos P. Constantinides、Panayiotis A. Koutentis、Georgia Loizou
DOI:10.1039/c1ob05167a
日期:——
Stille and Suzuki-Miyaura reactions of 7-iodo-1,3-diphenyl-1,4-dihydro-1,2,4-benzotriazin-4-yl are presented as rare examples of cross-coupling reactions with stable organic radicals. Both the Stille and Suzuki-Miyaura reactions are in most cases high yielding but the latter are cleaner while the former are faster and are accompanied by 1,3-diphenyl-1,2,4-benzotriazin-7(H)-one as by-product. A range of 7-aryl and 7-heteroaryl-1,2,4-benzotriazinyls have been synthesized and characterized using standard spectroscopic and spectrometric means.
Stille 反应和 7-碘-1,3-二苯基-1,4-二氢-1,2,4-苯并三嗪-4-基的 Suzuki-Miyaura 反应是利用稳定的有机自由基进行交叉偶联反应的罕见实例。在大多数情况下,Stille 反应和 Suzuki-Miyaura 反应的产率都很高,但后者更清洁,而前者更快,并伴有 1,3-二苯基-1,2,4-苯并三嗪-7(H)-酮作为副产物。我们采用标准的光谱和分光手段合成了一系列 7-芳基和 7-杂芳基-1,2,4-苯并三嗪,并对其进行了表征。