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
Pd/Cu-Catalyzed C–H/C–H Cross Coupling of (Hetero)Arenes with Azoles through Arylsulfonium Intermediates
作者:Ze-Yu Tian、Zeng-Hui Lin、Cheng-Pan Zhang
DOI:10.1021/acs.orglett.1c01322
日期:2021.6.4
A highly efficient method for the selective formal C–H/C–H cross-coupling of azoles and (hetero)arenes was established through arylsulfonium intermediates under transition-metal catalysis, which produced a variety of 2-(hetero)aryl azoles in good to excellent yields. Advantages of the reaction included mildness, a good functional group tolerance, a wide range of substrates, a high regio- and chemoselectivity
Site-Selective C–H Functionalization–Sulfination Sequence to Access Aryl Sulfonamides
作者:Eva Maria Alvarez、Matthew B. Plutschack、Florian Berger、Tobias Ritter
DOI:10.1021/acs.orglett.0c00982
日期:2020.6.19
Aryl sulfinates are precursors to a diverse number of sulfonyl-derived arenes, which are common motifs in pharmaceuticals and agrochemicals. Here, we report a site-selective two-step C–H sulfination sequence via arylsulfoniumsalts to access aryl sulfonamides. Combined with site-selective aromatic thianthrenation, an operationally simple one-pot palladium-catalyzed protocol introduces the sulfonyl
efficient palladium-catalyzed synthesis of esters from readily available arenes has been developed. These C–H bond esterifications were achieved relying on the regioselective thianthrenation to generate the aryl-TT salts, which were treated as reactive electrophilic substrates to couple with phenol formate and N-hydroxysuccinimide (NHS) formate giving access to phenol esters and NHS esters, respectively
Palladium-Catalyzed Synthesis of C-1 Deuterated Aldehydes from (Hetero) Arenes Mediated by C (sp<sup>2</sup>)–H Thianthrenation
作者:Binlin Zhao、Qiuzhu Wang、Tianxiang Zhu、Bin Feng、Mengtao Ma
DOI:10.1021/acs.orglett.2c02328
日期:2022.8.5
palladium-catalyzed deuterated formylation of aryl sulfonium salts is prepared conveniently from readily available arenes, which enables the expedient synthesis of a series of structurally diverse C-1 deuterated aldehydes with 96%–99% deuterium incorporation. The easy to handle and cost-effective DCOONa provides a deuterium source, which can be introduced onto the formyl units with excellent selectivity under the