Base‐Mediated O‐Arylation of Alcohols and Phenols by Triarylsulfonium Triflates
作者:Xiao‐Xia Ming、Ze‐Yu Tian、Cheng‐Pan Zhang
DOI:10.1002/asia.201900968
日期:2019.10
A mild and efficient protocol for O-arylation of alcohols and phenols (ROH) by triarylsulfonium triflates was developed under transition-metal-free conditions. Various alcohols, including primary, secondary and tertiary, and phenols bearing either electron-donating or electron-withdrawing groups on the aryl rings were smoothly converted to form the corresponding aromatic ethers in moderate to excellent
Pushing the Limits of Neutral Organic Electron Donors: A Tetra(iminophosphorano)-Substituted Bispyridinylidene
作者:Samuel S. Hanson、Eswararao Doni、Kyle T. Traboulsee、Graeme Coulthard、John A. Murphy、C. Adam Dyker
DOI:10.1002/anie.201505378
日期:2015.9.14
deprotonation reaction involving its readily prepared pyridinium ion precursor. This donor is able to reduce a variety of aryl halides, and, owing to its redox potential, was found to be the first organicdonor to be effective in the thermally induced reductiveSN bond cleavage of N,N‐dialkylsulfonamides, and reductive hydrodecyanation of malonitriles.
Fe‐Catalyzed Intramolecular Cross‐Dehydrogenative Arylation (CDA), Efficient Synthesis of 1‐Arylnaphthalenes and 4‐Arylcoumarins
作者:Haiyan Diao、Changcheng Wang、Zhen Zhang、Zhangjie Shi、Feng Liu
DOI:10.1002/hlca.202100056
日期:2021.7
Direct cross-dehydrogenative coupling of different inert C−H bonds is the most straightforward and environmentally benign method to construct C−C bonds. In this paper, we developed an iron-catalyzed intramolecular cross-dehydrogenative arylation (CDA) between benzylic C(sp3)H bond and aromaticC(sp2)H bond. From the readily available linear substrates, 1-arylnaphthalenes and 4-arylcoumarins can be