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
is evaluated, intermediates along the reaction sequence have been trapped, and side-reactions identified. In addition, the X-ray structures of a complete set of these salts are reported and their reactivities studied. Specifically, chemoselective Suzuki coupling is observed at the dibenzothiophenium in the presence of iodides.
报道了一种从廉价的二苯并噻吩 S-氧化物和简单的芳烃开始制备 5-(芳基)二苯并噻吩鎓盐的合成方案。评估了有关芳烃性质的方法范围,捕获了反应序列中的中间体,并识别了副反应。此外,还报道了这些盐的整套 X 射线结构并研究了它们的反应性。具体而言,在碘化物存在下,在二苯并噻吩鎓处观察到化学选择性铃木偶联。
Synthesis and characterization of triarylsulfonium salts as novel cationic photoinitiators for UV-photopolymerization
作者:Bianxiang Zhang、Tingting Li、Yongqiang Kang
DOI:10.1007/s11164-017-3009-1
日期:2017.11
Using diaryliodonium salts as the arylating reagent and copper as a catalyst, a series of triarylsulfonium salts bearing benzoyl or benzoheterocyclic moieties were synthesized and characterized by 1H NMR, 13C NMR and high-resolution mass spectrometry. The photoinitiating behavior of the triarylsulfonium salts on photopolymerization of epoxy acrylate resin (UV6104) with hexane-1,6-diyldiacrylate (HDDA)
以二芳基don盐为芳基化剂,铜为催化剂,合成了一系列带有苯甲酰基或苯并杂环部分的三芳基ulf盐,并通过1 H NMR,13 C NMR和高分辨率质谱进行了表征。研究了三芳基ulf盐在环氧丙烯酸酯树脂(UV6104)与1,6-己二丙烯酸二乙酯(HDDA)作为活化单体的光聚合反应中的光引发行为。结果表明,这些三芳基ulf盐可在紫外光固化过程中用作阳离子光引发剂。已经提出了聚合光引发机理。
Torsional strain inversed chemoselectivity in a Pd-catalyzed atroposelective carbonylation reaction of dibenzothiophenium
enantioselective ring-opening/carbonylation of cyclic diarylsulfonium salts is reported. In comparison to thioethers, the sulfonium salts displayed high reactivity and enabled the reaction to be performed under mild conditions (room temperature). The steric repulsion of the two non-hydrogen substituents adjacent to the axis led cyclic diarylsulfonium salts to be distorted, which enabled the ring-opening reaction