Synthesis of Triazafluoranthenones via Silver(I)-Mediated Nonoxidative and Oxidative Intramolecular Palladium-Catalyzed Cyclizations
作者:Panayiotis A. Koutentis、Georgia Loizou、Daniele Lo Re
DOI:10.1021/jo200966k
日期:2011.7.15
(AgF)-mediated intramolecular nonoxidative and oxidative palladium-catalyzed cyclizations of 1,3-diphenyl- and 8-iodo-1,3-diphenylbenzo[e][1,2,4]triazin-7(1H)-ones 6a (R = H) and 7a (R = I) afford a new ‘alkaloid like’ ring system 2-phenyl-6H-[1,2,4]triazino[5,6,1-jk]carbazol-6-one 8a (triazafluoranthenone) in 86 and 100% yields, respectively. Furthermore, these cyclization protocols were used to prepare triazafluoranthenone
氟化银(I)介导的1,3-二苯基和8-碘-1,3-二苯基苯并[ e ] [1,2,4]三嗪7(1 )的分子内非氧化和氧化钯催化的环化反应H)-一6a(R = H)和7a(R = I)提供了一个新的“生物碱样”环系2-苯基-6 H- [1,2,4] triazino [5,6,1- jk ]咔唑-6一8a(三氮杂蒽酮),产率分别为86%和100%。此外,这些环化方案还用于制备三氮杂氟蒽酮类似物8b – e,在C-5处带有二烷基氨基,甲氧基和苯基硫烷基取代基,它们也是由三氮杂氟蒽酮独立合成的8a通过区域选择性亲核加成。类似的AgF介导的8,10-二氢-1-碘-10-苯基吩嗪-2(7 H)-ones的分子内非氧化和氧化钯催化的环化反应13产生了新的“生物碱样”环系统8 H-吲哚[1] ,2,3- MN ]吩嗪-8-酮14分别在80分18%的收率。