Rhodium(iii)-catalyzed C2-selective carbenoid functionalization and subsequent C7-alkenylation of indoles
作者:Jingjing Shi、Yunnan Yan、Qiu Li、H. Eric Xu、Wei Yi
DOI:10.1039/c4cc01593b
日期:——
versatile method for efficient synthesis of a diverse range of 2-acetate substituted indoles via Rh(III)-catalyzed and alcohol-mediated C2-selective carbenoidinsertion functionalization of indoles by alpha-diazotized Meldrum'sacid has been developed. Furthermore, for the first time, a Rh(III)/Cu(II)-catalyzed direct C7-alkenylation of such functionalized products has also been demonstrated.
Rh-Catalyzed C–H bond alkylation of indoles with α,α-difluorovinyl tosylate <i>via</i> indolyl group migration
作者:Lu Zhou、Chuan Zhu、Teck-Peng Loh、Chao Feng
DOI:10.1039/c8cc02183j
日期:——
Herein we demonstrate that an alkylation of indoles could be accessed through C–H bond functionalization with α,α-difluorovinyl tosylate. The key aspect for the effective alkylation is the influence of the fluorine substituents on the reactivity of the CC double bond, allowing regioselective insertion as well as an indolyl group shift process. Furthermore, the fluorides are removed through alcoholysis
Rh(III)-Catalyzed three-component C H functionalization reaction with vinylene carbonate: Late-stage C H esterification of indole derivatives
作者:Bin-Shi Li、Huai-Xuan Guo、Wei Sun、Meng Sun
DOI:10.1016/j.tetlet.2022.153854
日期:2022.6
An efficient and robust Rh(III)-catalyzedthree-component CH esterification reaction of indole derivatives with vinylene carbonate to access indolyl acetates has been developed.This protocol exhibits high efficiency, good yields, and excellent functional group tolerance. Significantly, this method provides a powerful approach for the late-stage modification of indole-based substrates and natural alcohols
开发了一种高效、稳健的 Rh(III) 催化的吲哚衍生物与碳酸亚乙烯酯的三组分 C H 酯化反应以获取乙酸吲哚酯。该协议具有高效、良好的收率和优异的官能团耐受性。值得注意的是,该方法为吲哚基底物和天然醇的后期改性提供了一种强有力的方法。
Heterogeneous Photocatalytic C–H Functionalization of Indoles with Diazo Compounds Enabled by Carbon Nitride
we reported the heterogeneousphotocatalyticC–H alkylation of indoles with diazo compounds using graphitic carbonnitride (g-C3N4) as the photocatalyst. The reaction was carried out under a simple operation and mild conditions. In addition, the catalyst was found to be stable and reusable after five reaction cycles. The photochemical reaction proceeds via an intermediary of a carbon radical, which
在此,我们报道了使用石墨氮化碳(gC 3 N 4)作为光催化剂,吲哚与重氮化合物的非均相光催化C-H烷基化反应。该反应操作简单,条件温和。此外,发现该催化剂在五个反应循环后稳定且可重复使用。光化学反应通过碳自由基的中介进行,碳自由基是通过可见光促进的质子耦合电子转移(PCET)过程从重氮化合物产生的。
Iridium(III)-Catalyzed Regioselective Carbenoid Insertion C-H Alkylation by α-Diazotized Meldrum's Acid
作者:Honggui Lv、William L. Xu、Kunhua Lin、Jingjing Shi、Wei Yi
DOI:10.1002/ejoc.201601212
日期:2016.12
straightforward protocol for IrIII-catalyzed regioselective carbenoid insertion C–H alkylationmediated by α-diazotized Meldrum's acid was developed. The assistance of external additives and oxidants was not needed, and the developed IrIII catalysis proceeds in a highly efficient manner (e.g., mild reaction conditions, short reaction times and excellent regioselectivity) and demonstrates good compatibility