highly selective C-2 difluoromethylation of indole derivatives was developed by using sodium difluoromethylsulfinate (HCF2SO2Na) as the source of difluoromethyl groups and a Cu(II) complex as the catalyst. Various substrates were well tolerated in this transformation and the desired products were obtained in moderate to good yields. Moreover, the late-stage C-2 difluoromethylation of bioactive molecules
通过使用二氟甲基亚磺酸钠(HCF 2 SO 2 Na)作为二氟甲基的来源和Cu(II)络合物作为催化剂,开发了一种新颖且高效的吲哚衍生物高选择性C-2二氟甲基化方法。在这种转化中,各种底物都具有良好的耐受性,并且以中等至良好的产率获得了所需的产物。此外,以高收率实现了含有吲哚环的生物活性分子的后期C-2二氟甲基化。通常,该反应具有出色的官能团相容性,广泛的底物范围和出色的C-2选择性。
Direct Hiyama Cross-Coupling of (Hetero)arylsilanes with C(sp<sup>2</sup>)–H Bonds Enabled by Cobalt Catalysis
We report a chelation-assisted C–H arylation of various indoles with sterically and electronically diverse (hetero)arylsilanes enabled by cost-effective Cp*-free cobaltcatalysis. Key to the success of this strategy is the judicious choice of copper(II) fluoride as a bifunctional sliane activator and catalyst reoxidant. This methodology features a broad substrate scope and good functional group compatibility
Ru-Catalysed CH Arylation of Indoles and Pyrroles with Boronic Acids: Scope and Mechanistic Studies
作者:Carina Sollert、Karthik Devaraj、Andreas Orthaber、Paul J. Gates、Lukasz T. Pilarski
DOI:10.1002/chem.201405931
日期:2015.3.27
The Ru‐catalysed C2Harylation of indoles and pyrroles by using boronicacids under oxidative conditions is reported. This reaction can be applied to tryptophan derivatives and tolerates a wide range of functional groups on both coupling partners, including bromides and iodides, which can be further derivatised selectively. New indole‐based ruthenacyclic complexes are described and investigated as
A General Nickel-Catalyzed Method for C−H Bond Alkynylation of Heteroarenes Through Chelation Assistance
作者:Shrikant M. Khake、Vineeta Soni、Rajesh G. Gonnade、Benudhar Punji
DOI:10.1002/chem.201605306
日期:2017.2.24
A general nickel‐catalyzed method for the alkynylation of heteroarenes through monodentate chelation assistance is described. Many heterocycles, including indoles, pyrroles, imidazoles, and pyrazole, efficiently coupled with (triisopropylsilyl)alkynyl bromide, and synthetically important functional groups, such as halides, ether, nitrile, and nitro, are tolerated. Synthetic applicability of this Ni‐catalyzed
An Efficient Rhodium/Oxygen Catalytic System for Oxidative Heck Reaction of Indoles and Alkenes
<i>via</i>
CH Functionalization
作者:Lei Yang、Guoying Zhang、Hanmin Huang
DOI:10.1002/adsc.201301107
日期:2014.5.5
A rhodium(III)‐catalyzed direct selective C‐2 alkenylation reaction of indoles with alkenes has been developed with molecular oxygen as the sole oxidant. The rhodium/oxygen catalytic system is applicable to a broad range of indoles and alkenes, which provides a novel access to various C‐2 alkenylated indoles and pyrroles.