AbstractAn in situ generated cationic ruthenium(II) catalyst allowed for robust CH arylations of anilides with boronic acids. The optimized ruthenium catalyst was found to be both site selective and chemoselective, thereby providing the monoarylated products in excellent yields with ample substrate scope. The catalyst’s high efficacy furthermore set the stage for efficient CH arylations with borinic acids as well as potassium trifluoroborates.magnified image
The catalytic reaction of ketoximes with aryliodides via a Beckmann rearrangement in the presence of a catalytic amount of Pd(OAc)2, Ag2O and ZnBr2 gave substituted phenanthridines in good to excellent yield. In the reaction, aromatic ketoximes converted first to acetanilides in the presence of ZnBr2/TFA via a Beckmann rearrangement followed by arylation in the presence of palladium complex. Furthermore
We report a general, direct C–Harylation of anilide derivatives using reusable palladium or copper oxide on magnetite as heterogeneous precatalysts. Highly selective ortho and meta arylations are achieved using electronically and sterically diverse diaryliodonium salts. Catalytically active soluble species from the heterogeneous precursors were detected by experimental techniques. Preliminary mechanistic
A class of pyrazole derivatives is described for use in treating p38 kinase medicated disorders. Compounds of particular interest are defined by Formula IA
wherein R
1
, R
2
, R
3
and R
4
are as described in the specification.
Verfahren zum Herstellen von Biphenylaminen aus Aniliden durch Rutheniumkatalyse
申请人:Bayer CropScience AG
公开号:EP3009420A1
公开(公告)日:2016-04-20
Die vorliegende Erfindung betrifft ein neues Verfahren zum Herstellen von substituierten Biphenylamiden der allgemeinen Formel (V)
dadurch gekennzeichnet, dass man
Anilide der Formel (II)
in einem von Tetrahydrofuran verschiedenen Lösungsmittel
mit einer Organoborverbindung der Formel (III)
in Gegenwart eines Katalysatorsystems bestehend aus einem Rutheniumkatalysator, einem Aktivierungsmittel, einem Oxidationsmittel und einem Metalltriflat umsetzt.
本发明涉及一种制备通式(V)的取代联苯酰胺的新工艺
其特征在于
式 (II) 的苯胺类
在四氢呋喃以外的溶剂中
与式 (III) 的有机硼化合物反应
在由钌催化剂、活化剂、氧化剂和三酸盐金属组成的催化剂体系存在下。
Process for preparing biphenylamines from anilides by ruthenium catalysis
申请人:BAYER CROPSCIENCE AKTIENGESELLSCHAFT
公开号:US10246407B2
公开(公告)日:2019-04-02
The present invention relates to a novel process for preparing substituted biphenylamides of the general formula (V)
characterized in that
anilides of the formula (II)
in a solvent other than tetrahydrofuran,
are reacted with an organoboron compound of the formula (III)
in the presence of a catalyst system consisting of a ruthenium catalyst, an activator, an oxidizing agent and a metal triflate.