The organocatalytic synthesis of perfluorophenylsulfides <i>via</i> the thiolation of trimethyl(perfluorophenyl)silanes and thiosulfonates
作者:Jinyun Luo、Muze Lin、Leifang Wu、Zhihua Cai、Lin He、Guangfen Du
DOI:10.1039/d1ob01350e
日期:——
The organic superbase t-Bu-P4-catalyzed direct thiolation of trimethyl(perfluorophenyl)silanes and thiosulfonates was developed. Yields of perfluorophenylsulfides of up to 97% under catalysis of 5 mol% t-Bu-P4 were achieved. This method was shown to provide an efficient way to construct the perfluorophenyl–sulfur bond under mild metal-free reaction conditions.
开发了有机超碱t -Bu-P 4催化的三甲基(全氟苯基)硅烷和硫代磺酸盐的直接硫醇化反应。在 5 mol% t -Bu-P 4的催化下,全氟苯硫醚的产率高达 97% 。该方法被证明提供了一种在温和的无金属反应条件下构建全氟苯基-硫键的有效方法。
Metal‐Free Synthesis of Thiosulfonates via Insertion of Sulfur Dioxide
作者:Guoqing Li、Ziyu Gan、Kexin Kong、Xiaomeng Dou、Daoshan Yang
DOI:10.1002/adsc.201900157
日期:2019.4.16
A simple and catalyst‐free strategy was developed for the synthesis of unsymmetrical thiosulfonates using readily available DABCO⋅(SO2)2 as a solid and bench‐stable sulfur dioxide surrogate. The corresponding thiosulfonates were obtained through a radical pathway with good functional group tolerance. This strategy offers a promising synthesis method for the construction of diverse and useful thiosulfonates
Dual gold and photoredox catalysis: visible light-mediated intermolecular atom transfer thiosulfonylation of alkenes
作者:Haoyu Li、Cuicui Shan、Chen-Ho Tung、Zhenghu Xu
DOI:10.1039/c6sc05093j
日期:——
Regioselective difunctionalization of alkenes has attracted significant attention from synthetic chemists and has the advantage of introducing diverse functional groups into vicinal carbons of common alkene moieties in a single operation. Herein, we report an unprecedented intermolecular atom transfer thiosulfonylation reaction of alkenes by combining gold catalysis and visible-light photoredox catalysis
Selective Multiple Magnesiations of the Thieno[3,2-b]thiophene Scaffold
作者:Thomas Kunz、Paul Knochel
DOI:10.1002/chem.201002506
日期:2011.1.17
A full functionalization of all four positions of the thieno[3,2‐b]thiophene scaffold was achieved. Starting from 2,5‐dichlorothieno[3,2‐b]thiophene, magnesiation of the 3‐ and 6‐position using tmpMgCl⋅LiCl furnishes, after trapping with various electrophiles, 3,6‐difunctionalized dichlorothieno[3,2‐b]thiophenes. Subsequent dechlorination and regioselective metalation or regioselective magnesium insertion
噻吩并[3,2- b ]噻吩支架的所有四个位置都实现了完全功能化。从2,5-二氯噻吩并[3,2- b ]噻吩开始,在被各种亲电试剂捕获后,使用tmpMgCl⋅LiCl放大3和6-位,使3,6-二官能化的二氯噻吩并[3,2- b ]噻吩。随后的脱氯和区域选择性金属化或区域选择性镁插入CCl键可提供完全功能化的噻吩并[3,2- b ]噻吩。此外,已经制备了这些化合物的新的稠合杂环和小的低聚物,它们在材料化学中具有潜在的应用。
Copper(I)-Catalyzed Interrupted Click Reaction: Synthesis of Diverse 5-Hetero-Functionalized Triazoles
The 5‐heterofunctionalized triazoles are important scaffolds in bioactive compounds, but current clickreactions (CuAAC) cannot produce these core structures. A copper(I)‐catalyzed interruptedclickreaction to access diverse 5‐functionalized triazoles is reported. Various 5‐amino‐, thio‐, and selenotriazoles were readily assembled in one step in high yields. The reaction proceeds under mild conditions