2,2′-Biaryldicarboxylate Synthesis via Electrocatalytic Dehydrogenative C–H/C–H Coupling of Benzoic Acids
作者:Zhongyi Zeng、Jonas F. Goebel、Xianming Liu、Lukas J. Gooßen
DOI:10.1021/acscatal.1c01127
日期:2021.6.4
catalysts. These compounds have been found to be conveniently accessible from benzoicacidsvia Rh-catalyzed electrooxidative C–H/C–H couplings, giving valuable dihydrogen as the byproduct. In an undivided cell with Pt electrodes, RhCl3·3H2O catalyzes the oxidative carboxylate-directed ortho-homocoupling of various aromatic acids with a current efficiency of 67%. The protocol is operationally simple, tolerates
NOVEL COMPOUND, POLYIMIDE RESIN AND METHOD OF PRODUCING THE SAME, PHOTOSENSITIVE RESIN COMPOSITION, PATTERNING METHOD AND METHOD OF FORMING CURED FILM, INTERLAYER INSULATING FILM, SURFACE PROTECTIVE FILM, AND ELECTRONIC COMPONENT
申请人:International Business Machines Corporation
公开号:US20210317270A1
公开(公告)日:2021-10-14
Provided is a compound that can be used as a base resin for a photosensitive resin composition. The photosensitive resin can form a fine pattern and can achieve high resolution without impairing mechanical strength and solubility. The compound is represented by the general formula (1):
wherein Z represents a linear, branched or cyclic divalent hydrocarbon group having 2 to 30 carbon atoms; X
1
to X
3
represent any of —CO
2
—, —CONR
X1
—, —O—, —NR
X1
—, —S—, —SO
2
—, —SO
3
— and —SO
2
NR
X1
— and may be the same as or different from each other, provided that R
X1
is a hydrogen atom or a monovalent hydrocarbon group having 1 to 30 carbon atoms; Ar represents a divalent aromatic group having 2 to 30 carbon atoms; L
1
and L
2
independently represent a divalent hydrocarbon group having 1 to 30 carbon atoms; and x and y are each independently 0 or 1.
PROCESS FOR THE SYNTHESIS OF HYDROXY AROMATIC ACIDS
申请人:Ritter Joachim C.
公开号:US20080139843A1
公开(公告)日:2008-06-12
Hydroxy aromatic acids are produced in high yields and high purity (>95%) from halogenated aromatic acids in a reaction mixture containing a copper source and a ligand that coordinates to copper.