Potassium iodide promoted thiolation of pyrazolones and benzofurans using aryl sulfonyl chlorides as sulfenylation reagents
作者:Xia Zhao、Xiaoyu Lu、Aoqi Wei、Xiaoliang Jia、Jun Chen、Kui Lu
DOI:10.1016/j.tetlet.2016.10.053
日期:2016.11
thioethers as well as 2-aryl and 3-aryl benzofuran thioethers by employing aryl sulfonyl chlorides as sulfenylation reagents in the presence of triphenylphosphine was developed. Potassium iodide was found to facilitate the transformation for the first time by generating more reactive sulfenyl iodide in situ from sulfenyl chloride.
Synthesis of 2-Aryl and 3-Aryl Benzo[<i>b</i>]furan Thioethers Using Aryl Sulfonyl Hydrazides as Sulfenylation Reagents
作者:Xia Zhao、Lipeng Zhang、Xiaoyu Lu、Tianjiao Li、Kui Lu
DOI:10.1021/acs.joc.5b00146
日期:2015.3.6
An efficient, metal-free protocol used to synthesize aryl benzo[b]furan thioethers based on the I2-catalyzed cross-coupling of benzo[b]furans as well as the electrophilic cyclization of 2-alkynylphenol derivatives with aryl sulfonyl hydrazides was developed. Various 2-aryl and 3-aryl benzo[b]furan thioethers were obtained in moderate to good yields.
开发了一种有效的,无金属的方案,该方案用于基于I 2催化的苯并[ b ]呋喃的交叉偶联以及2-炔基苯酚衍生物与芳基磺酰肼的亲电环化反应来合成芳基苯并[ b ]呋喃硫醚。。以中等至良好的产率获得了各种2-芳基和3-芳基苯并[ b ]呋喃硫醚。
PdCl<sub>2</sub>-Promoted Electrophilic Annulation of 2-Alkynylphenol Derivatives with Disulfides or Diselenides in the Presence of Iodine
作者:Hui-Ai Du、Xing-Guo Zhang、Ri-Yuan Tang、Jin-Heng Li
DOI:10.1021/jo9016309
日期:2009.10.16
of 3-chalcogen-benzo[b]furans via palladium-promoted annulation reactions of 2-alkynylphenol derivatives with disulfides or diselenides and iodide has been developed. In the presence of I2 and PdCl2, both 3-sulfenylbenzofurans and 3-selenenylbenzofurans were selectively prepared from the cyclization of 2-alkynyanisoles with disulfides or diselenides in moderate to excellent yields.
通过2-炔基苯酚衍生物与二硫化物或二硒化物和碘化物的钯促进的环化反应,已开发出有效合成3-硫属元素-苯并[ b ]呋喃的方法。在I 2和PdCl 2的存在下,由2-炔基吲哚与二硫化物或二硒化物的环化反应选择性地制备了3-亚磺酰基苯并呋喃和3-硒烯苯并呋喃,且产率中等至优异。
Palladium-catalyzed three-component cascade arylthiolation with aryldiazonium salts as <i>S</i>-arylation sources
A novel and efficient palladium-catalyzed three-component cascade cyclization/arylthiolation has been developed for the assembly of diverse 3-sulfenylindole and 3-sulfenylbenzofuran derivatives from 2-alkynylamines and 2-alkynylphenols, aryldiazonium salts, and Na2S2O3 under aerobic conditions with PEG-200 as an environmentally benign medium. The current study features exceptional functional group
A novel and efficient palladium-catalyzed cascade annulation/arylthiolation reaction has been developed to afford functionalized 3-sulfenylbenzofuran and 3-sulfenylindole derivatives in moderate to good yields from readily available 2-alkynylphenols and 2-alkynylamines in ionic liquids. This protocol provides a valuable synthetic tool for the assembly of a wide range of 3-sulfenylbenzofuran and 3-sulfenylindole