Iridium-Catalyzed Tandem Dehydrogenation/Hydroarylation Approach to Synthetically Versatile C2-Alkenyl N–H Indoles
作者:Carlos Lázaro-Milla、José L. Mascareñas、Fernando López
DOI:10.1021/acscatal.3c05841
日期:2024.3.1
Readily available N-carbamoyl indolines can be converted into highly valuable 2-alkenyl and 2-alkyl indoles in a one-pot reaction, through an autotandem catalytic cascade promoted by an iridium complex. The process entails a dehydrogenation reaction initiated by an iridium-promoted C(sp3)–H activation, the addition of the resulting indole to an alkyne -or alkene-partner, and a spontaneous loss of the carbamoyl
通过铱络合物促进的自动串联催化级联,可以在一锅反应中将容易获得的N-氨基甲酰二氢吲哚转化为高价值的 2-烯基和 2-烷基吲哚。该过程需要由铱促进的 C(sp 3 )–H 活化引发的脱氢反应,将所得吲哚添加到炔烃或烯烃伴侣上,以及氨基甲酰基导向基团的自发损失。有趣的是,所得的C2-烯基吲哚可以参与由C-H活化引发的各种金属催化环化,包括正式的[4 + 1]和[4 + 2]环加成,以及交叉脱氢环化,从而使获得功能丰富的含氮杂环集合的不同途径。