Methyl Esters as Cross-Coupling Electrophiles: Direct Synthesis of Amide Bonds
作者:Yan-Long Zheng、Stephen G. Newman
DOI:10.1021/acscatal.9b00884
日期:2019.5.3
metal-catalyzed cross-coupling are two of the most frequently used chemical reactions in organic synthesis. Recently, an overlap between these two reaction families was identified when Pd and Ni catalysts were demonstrated to cleave the strong C–O bond present in esters via oxidative addition. When simple methyl and ethyl esters are used, this transformation provides a powerful alternative to classical amide bond
[EN] PROCESS FOR THE PREPARATION OF PYRAZOLE-4-CARBOXAMIDES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE PYRAZOLE-4-CARBOXAMIDES
申请人:SOLVAY
公开号:WO2012055864A1
公开(公告)日:2012-05-03
The invention concerns a process for the manufacture of pyrazole-4-carboxamides, in particular, of 3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxamides which are useful as pharmaceuticals and agrochemicals. The carboxamides are prepared from the corresponding pyrazole-4-carboxylic acid esters and appropriate amine in the presence of a base. The reaction is performed in a reaction medium which is essentially free of water; alternatively, the base is used in an amount equal to or greater than 0.25 equivalents per mole of amine.
This invention relates to fungicidal mixtures of certain phenylamidines, their N-oxides, and/or agriculturally suitable salts thereof, and to compositions comprising such mixtures and methods for using such mixtures as fungicides.
This invention relates to novel pyrazolylcarboxanilides of formula (I)
in which R, R
1
, R
2
and R
3
are as defined in the disclosure, to a plurality of processes for preparing these substances and their use for controlling unwanted microorganisms, and to novel intermediates and their preparation.
N-(Ortho-Phenyl)-1-Methyl-3-Difluoromethylpyrazole-4-Carboxanilides And Their Use As Fungicides
申请人:Gewehr Markus
公开号:US20080108686A1
公开(公告)日:2008-05-08
The present invention relates to N-(ortho-phenyl)-1-methyl-3-difluoromethylpyrazole-4-carboxanilides of the formula I
in which the substituents are as defined below:
R
1
and R
2
independently of one another are halogen, C
1
-C
6
-alkyl, C
1
-C
6
-haloalkyl, cyano, nitro, methoxy, trifluoromethoxy or difluoromethoxy.