Reactions between arynes and alkyl sulfides have been extensively studied over the past few decades. These reactions commonly end with a dealkylation process and thus deliver thioethers as final products. In contrast, the transformation described furnishes valuable triarylsulfonium salts, in lieu of thioethers, from arynes and diarylsulfides. The reaction features mild conditions and a broad substrate
Palladium-catalysed thioetherification of aryl and alkenyl iodides using 1,3,5-trithiane as sulfur source
作者:László Kollár、Yalamarti Venkat Rajat Rao、Alexandra Zugó、Péter Pongrácz
DOI:10.1016/j.tet.2021.132602
日期:2022.1
Thioetherification reaction of aryl iodides catalysed by palladium(II) complexes in the presence of 1,3,5-trithiane as sulphur source is reported. The paper presents the first homogeneous catalytic application of 1,3,5-trithiane in synthesis. Detailed optimization steps, the frames of the novel reaction are described, as well as the limitations and the substrate scope are also demonstrated. Moderate
报道了在 1,3,5-三噻烷作为硫源存在下由钯 (II) 配合物催化的芳基碘化物的硫醚化反应。该论文首次介绍了 1,3,5-三噻烷在合成中的均相催化应用。描述了详细的优化步骤、新反应的框架,以及局限性和底物范围。在各种取代的碘苯和一些链烯基碘的存在下,使用钯-黄原磷催化剂体系,实现了中等至良好的硫醚产率。还进行了混合底物存在下的竞争反应,并假设了机械方面的考虑。
Redox-Neutral Synthesis of Selenoesters by Oxyarylation of Selenoalkynes under Mild Conditions
作者:Lucas L. Baldassari、Anderson C. Mantovani、Samuel Senoner、Boris Maryasin、Nuno Maulide、Diogo S. Lüdtke
DOI:10.1021/acs.orglett.8b02544
日期:2018.9.21
selenoalkynes through an acid-catalyzed, redox-neutral oxyarylation reaction is reported. Brønsted acid activation of a selenoalkyne leads to a selenium-stabilized vinyl cation, which is captured by an aryl sulfoxide and undergoes sigmatropic rearrangement to deliver the final α-arylated selenoester product. Computational studies have been carried out to elucidate the nature of the Se-stabilized carbocation
A photoacid generator compound has formula (I):
G
+
Z
−
(I)
wherein G has formula (II):
In formula (II), X is S or I, each R
0
is commonly attached to X and is independently C
1-30
alkyl; polycyclic or monocyclic C
3-30
cycloalkyl; polycyclic or monocyclic C
6-30
aryl; or a combination comprising at least one of the foregoing groups. G has a molecular weight greater than 263.4 g/mol, or less than 263.4 g/mol. One or more R
0
groups are further attached to an adjacent R
0
group, a is 2 or 3, wherein when X is I, a is 2, or when X is S, a is 2 or 3. Z in formula (I) comprises the anion of a sulfonic acid, a sulfonimide, or a sulfonamide. A photoresist and coated film also includes the photoacid generator, and a method of forming an electronic device uses the photoresist.
Photoinduced Nucleophilic Substitution of Aryl Halides with Potassium Thioacetate – A One-Pot Approach to Aryl Methyl and Diaryl Sulfides
作者:Luciana C. Schmidt、Valentina Rey、Alicia B. Peñéñory
DOI:10.1002/ejoc.200500955
日期:2006.5
Aryl methyl sulfides and diaryl sulfides were prepared by photoinduced reactions of potassium thioacetate with arylhalides under entrainment conditions. Without isolation, the arene thiolates obtained by the aromatic substitution were quenched with methyl iodide to afford the aryl methyl sulfides in 26–59 % yields in a “one-pot” procedure together with the diaryl sulfides in variable yields (3–31 %)