An Efficient Method for Sterically Demanding Suzuki-Miyaura Coupling Reactions
作者:Qing Zhao、Chengxi Li、Chris H. Senanayake、Wenjun Tang
DOI:10.1002/chem.201203898
日期:2013.2.11
An efficientmethod for sterically demanding Suzuki–Miyauracoupling reactions has been developed with two catalysts, Pd/BI‐DIME (see scheme) and Pd/phenanthrene‐based ligand. The Pd/BI‐DIME catalyst facilitates the syntheses of extremely hindered biaryls bearing ortho‐isopropyl substituents. The other catalyst is efficient for the synthesis of functionalized tetra‐ortho‐substituted biaryls at low
FLUORINATED-AROMATIC SULFONIC ACID CATALYST, PROCESS FOR ITS PRODUCTION, AND ITS USE
申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0426846A1
公开(公告)日:1991-05-15
The invention provides a fluorinated aromatic sulfonic acid catalyst in which sulfonic acid groups and aryl groups substituted by fluorine atoms or fluoroalkyl groups are bound to a matrix selected from the group consisting of polysiloxane and inorganic base material. This catalyst can be produced by introducing sulfonic acid groups and aryl groups substituted by fluorine atoms or fluoroalkyl groups into the above-described matrix. This catalyst is used in various acid-catalyzed reactions such as esterification, acylation, nitration, alkylation, etherification, etc., particularly acid-catalyzed reactions in the presence of water to show a high acid catalysis activity. In addition, since this catalyst is solid, its handling is so easy that recovery and reuse thereof is easy.