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。
Catalyst-Controlled Regiodivergent Alkyne Insertion in the Context of C−H Activation and Diels-Alder Reactions: Synthesis of Fused and Bridged Cycles
作者:Xukai Zhou、Yupeng Pan、Xingwei Li
DOI:10.1002/anie.201704036
日期:2017.7.3
Rhodium(III)- and cobalt(III)-catalyzed C−Hactivation of indoles and coupling with 1,6-enynes is discussed. Under rhodium(III) catalysis, the alkyne insertion follows 2,1-regioselectivity with a subsequent type-I intramolecular Diels–Alder reaction (IMDA) to afford [6,5]-fused cycles. When catalyzed by the cobalt(III) congener, 1,2-insertion of the alkyne is preferred, and followed by a rare type-II
Ruthenium-Catalyzed Direct C–H Bond Arylations of Heteroarenes
作者:Lutz Ackermann、Alexander V. Lygin
DOI:10.1021/ol2010648
日期:2011.7.1
Ruthenium-catalyzedC–Hbondarylations of indoles, thiophenes, and pyrroles were accomplished in a highly chemo- and site-selective manner through the use of removable directing groups.
Manganese‐Catalyzed C−H Functionalizations: Hydroarylations and Alkenylations Involving an Unexpected Heteroaryl Shift
作者:Chengming Wang、Ai Wang、Magnus Rueping
DOI:10.1002/anie.201704682
日期:2017.8.7
A manganese-catalyzed regio- and stereoselective hydroarylation of allenes is reported. The C−H functionalization method provides access to various alkenylated indoles in excellent yields. Moreover, a hydroarylation/cyclization cascade involving an unexpected C−N bond cleavage and aryl shift has been developed, which provides a new synthetic approach to substituted pyrroloindolones.
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.