α-Imino Iridium Carbenes from Imidoyl Sulfoxonium Ylides: Application in the One-Step Synthesis of Indoles
作者:Clarice A. D. Caiuby、Matheus P. de Jesus、Antonio C. B. Burtoloso
DOI:10.1021/acs.joc.0c00833
日期:2020.6.5
Imidoyl sulfoxonium ylides are presented for the first time as potential precursors to generate α-imino metal-carbene intermediates and applied in direct C–H functionalization reactions catalyzed by [Ir(cod)Cl]2 (4 mol %) to provide 2-substituted indoles (up to 70% yield) in just one step. This class of sulfur ylide is successfully obtained from imidoyl chloride and dimethylsulfoxonium methylide (23
酰亚胺基亚砜基盐首次作为潜在的前体生成α-亚氨基金属-卡宾中间体,并应用于由[Ir(cod)Cl] 2(4 mol%)催化的直接C–H官能化反应中,以提供2-取代的一步即可获得吲哚(产率高达70%)。此类硫内鎓盐是从亚氨酰氯和二甲基亚砜基成功获得的(23个新实例,收率为45-85%),或者在TiCl 4作为路易斯酸存在下,由相应的β-酮基亚砜基和苯胺通过亚氨基形成而成功获得。(9个例子,产率33-94%)。