Selective Synthesis of <i>ortho-</i>Substituted Diarylsulfones by Using NHC-Au Catalysts under Mild Conditions
作者:Haibo Zhu、Yajing Shen、Daheng Wen、Zhang-Gao Le、Tao Tu
DOI:10.1021/acs.orglett.8b03957
日期:2019.2.15
A single-step gold(I)-catalyzed chemoselective protocol to access ortho-substituted diarylsulfones has been established. Acenaphthoimidazolylidene gold complexes are effective catalysts for the arylsulfonylation of boronic acids by potassium metabisulfite (K2S2O5) and diaryliodonium salts to access (poly-)ortho-substituted diarylsulfones even in gram scale. Unlike the transition metal-catalyzed two-component
已经建立了一步金(I)催化的化学选择方案以访问邻位取代的二芳基砜。ena啶咪唑基亚金络合物是焦亚硫酸氢钾(K 2 S 2 O 5)和二芳基碘鎓盐对硼酸进行芳基磺酰化的有效催化剂,即使以克为单位,也可得到(多)邻位取代的二芳基砜。与过渡金属催化的双组分偶联系统不同,二芳基碘鎓盐中的位阻芳基优先转移到体积较小的芳基上,以形成合成困难的靶标,包括具有药学重要性的靶标。
PPh<sub>3</sub>‐Mediated Nucleophilic Sulfonation of Sulfonyl Chlorides with Arynes: Access to Manifold Aryl Sulfones
作者:Hui‐Qi Yue、Qi‐Wei Li、Da‐Wei Shi、Rui‐Jia Yang、Liang‐Liang Han、Bin Yang
DOI:10.1002/ejoc.202300812
日期:2023.10.16
A novel PPh3-mediated nucleophilic sulfonation of sulfonyl chlorides with arynes has been demonstrated. This protocol exhibits broad functional group tolerance and provides a direct approach to a variety of aryl and alkyl sulfones.
[EN] POLYESTER RESIN, AND OPTICAL MATERIALS, FILMS AND IMAGE DISPLAY DEVICES USING THE SAME<br/>[FR] RÉSINE POLYESTER, ET MATÉRIAUX OPTIQUES, FILMS ET DISPOSITIFS D'AFFICHAGE D'IMAGES LES UTILISANT
申请人:FUJIFILM CORP
公开号:WO2011118845A1
公开(公告)日:2011-09-29
A polyester resin containing a structure represented by Formula (1) and a structure represented by Formula (2) : wherein R11 to R14 and R21 to R26 represent a hydrogen atom or a substituent; R15 to R18 represent a substituent; and at least one of R21 to R26 represents a substituent.