Introduction of Heteroaromatic Bases onto Cycloalkanes with BPO
作者:Luan Zhou、Hideo Togo
DOI:10.1002/ejoc.201801797
日期:2019.2.21
Treatment of heteroaromatics with BPO and CF3CO2H in cycloalkanes at 100 °C for 4 h generated C–C bonded heteroaromaticbases bearing cycloaklyl group in good yields under transition‐metal‐free conditions.
在环烷烃中,用BPO和CF 3 CO 2 H在100°C下处理杂芳族化合物4小时,在无过渡金属的条件下,生成的具有C-C键合的带有环烯丙基的杂芳族碱的收率很高。
<i>N</i>-Hydroxybenzimidazole as a structurally modifiable platform for <i>N</i>-oxyl radicals for direct C–H functionalization reactions
Methods for directfunctionalization of C–H bonds mediated by N-oxyl radicals constitute a powerful tool in modern organic synthesis. While several N-oxyl radicals have been developed to date, the lack of structural diversity for these species has hampered further progress in this field. Here we designed a novel class of N-oxyl radicals based on N-hydroxybenzimidazole, and applied them to the direct C–H functionalization
we describe the successful arylation of unactivated alkanes with heteroarenes by using iridium polypyridyl complexes as the photocatalyst and persulfate as the HAT catalyst precursor under visible-light irradiation. This reaction features good functional group tolerance and broad scope with regard to both alkane and heteroarene substrates (37 examples), which allows direct access to alkyl-substituted
Sc(OTf)<sub>3</sub>-Catalyzed Direct Alkylation of Quinolines and Pyridines with Alkanes
作者:Guojun Deng、Chao-Jun Li
DOI:10.1021/ol900070x
日期:2009.3.5
The Sc(OTf)3-catalyzed C−C bond formation by direct alkylation of quinolines and pyridines using simple alkanes was developed. Various alkanes reacted with quinolines and pyridines to give the corresponding alkylation products in 50−91% yields in the presence of tert-butyl peroxide.
Electrophotocatalytic C−H Functionalization of N‐Heteroarenes with Unactivated Alkanes under External Oxidant‐Free Conditions
作者:Zhoumei Tan、Xinrui He、Kun Xu、Chengchu Zeng
DOI:10.1002/cssc.202102360
日期:2022.3.22
Two technologies, one goal: A sustainable electrophotocatalytic strategy to access alkyl radicals from unactivatedalkanes for the following Minisci alkylation reactions is developed. This method features broad substrate generality, earth-abundant cerium catalyst, external oxidant-free conditions, and excellent atom economy.