Copper-Catalyzed α-Methylenation of Benzylpyridines Using Dimethylacetamide as One-Carbon Source
摘要:
The direct alpha-methylenation of benzylpyridines was achieved using N,N-dimethylacetamide (DMA) as a one-carbon source under copper catalysis. An intermediary species was detected at an early stage, and a possible mechanism was proposed. Additionally, alpha-oxygenation and dimerization of benzylpyridines could also be performed efficiently.
Copper-catalysed oxidative Csp<sup>3</sup>–H methylenation to terminal olefins using DMF
作者:Jianming Liu、Hong Yi、Xin Zhang、Chao Liu、Ren Liu、Guoting Zhang、Aiwen Lei
DOI:10.1039/c4cc02275k
日期:——
A copper-catalysed direct oxidative Csp(3)-H methylenation to terminal olefins using DMF as one carbon source was developed. In this reaction, various functional groups were well tolerated, thus providing a simple way to construct arylvinylketones and arylvinylpyridines. The preliminary mechanistic investigations revealed that CH2 was from DMF (N-CH3).
Selective multifunctionalization of<i>N</i>-heterocyclic carbene boranes<i>via</i>the intermediacy of boron-centered radicals
作者:Feng-Xing Li、Xinmou Wang、Jiaxin Lin、Xiangyu Lou、Jing Ouyang、Guanwen Hu、Yangjian Quan
DOI:10.1039/d3sc01132a
日期:——
leading to complex NHC boranes with three different functional groups which are challenging to prepare by other methods. The strong hydrogen-abstracting ability of the excited decatungstate enables the generation of boryl radicals from mono- and di-substituted boranes for realizing borane multifunctionalization. This proof-of-principle research provides a new chance for fabricating unsymmetrical boranes and