Palladium-catalyzed carbonylation of iminoquinones and aryl iodides to access aryl <i>p</i>-amino benzoates
作者:Siqi Wang、Lingyun Yao、Jun Ying、Xiao-Feng Wu
DOI:10.1039/d1ob01623g
日期:——
A palladium-catalyzed carbonylation of iminoquinones and aryliodides has been developed for the construction of aryl p-amino benzoates. Using benzene-1,3,5-triyl triformate (TFBen) as the CO source, the reaction proceeded well to give various aryl p-amino benzoates in good to excellent yields. Additionally, control experiments were conducted to gain more insights into the reaction mechanism.
亚氨基醌和芳基碘化物的钯催化羰基化已被开发用于构建芳基对氨基苯甲酸酯。使用苯-1,3,5-三甲酸三酯 (TFBen) 作为 CO 源,反应进行得很好,以良好的收率得到了各种对氨基苯甲酸芳基酯。此外,还进行了对照实验以更深入地了解反应机理。
Pd-Catalyzed Redox-Neutral C–N Coupling Reaction of Iminoquinones with Electron-Deficient Alkenes without External Oxidants: Access of Tertiary (<i>E</i>)-Enamines and Application to the Synthesis of Indoles and Quinolin-4-ones
A novel and efficient reductive N-alkenylation of iminoquinones with electron-deficient olefins has been successfully developed by Pd(II)-catalyzed redox-neutral reactions, which provides a synthesis of tertiary (E)-enamines. We further demonstrate that the tertiary enamines can be converted to multifarious N-heterocyclic compounds, indoles, and quinolones in good yields.
of 2‐oxa‐3‐azabicyclo compounds and following Cu/C‐catalyzed N−O bond cleavage. The obtained cis‐4‐aminocyclohexenols, derived from cyclohexadiene as a cyclic 1,3‐diene, could be selectively oxidized by using the ruthenium‐on‐carbon (Ru/C) catalyst under oxygen atmosphere to the corresponding 4‐aminocyclohexenones at 50–65 °C or para‐iminoquinones at 100–110 °C as useful reactive synthetic precursors