PYRIDINECARBOXAMIDES, USEFUL-PLANT-PROTECTING COMPOSITION COMPRISING THEM AND PROCESSES FOR THEIR PREPARTION AND THEIR USE
申请人:Ziemer Frank
公开号:US20080269059A1
公开(公告)日:2008-10-30
Compounds of the formula (I), or salts thereof,
in which R
1
to R
4
are as defined in formula (I) of claim
1
are suitable as useful-plant-protecting agents for reducing or preventing harmful effects of agrochemicals on the useful plants and their method of preparation are described.
Nickel(0)-Catalyzed<i>N</i>-Allylation of Amides and<i>p</i>-Toluenesulfonamide with Allylic Alcohols under Neat and Neutral Conditions
作者:Mohamed Salah Azizi、Youssef Edder、Abdallah Karim、Mathieu Sauthier
DOI:10.1002/ejoc.201600500
日期:2016.8
Nickel(0)-catalyzed direct N-allylation of amides and p-toluenesulfonamide with allylic alcohols took place in the presence of Ni0–diphosphine complexes. The corresponding N-allylated (and/or N,N-diallylated) products were obtained in moderate to high yields under neutral conditions.
Metal-Free Difunctionalization of Pyridines: Selective Construction of <i>N</i>-CF<sub>2</sub>H and <i>N</i>-CHO Dihydropyridines
作者:Sen Zhou、Ze-Ying Sun、Kongying Zhu、Wentao Zhao、Xiangyang Tang、Minjie Guo、Guangwei Wang
DOI:10.1021/acs.orglett.1c00352
日期:2021.3.19
N-difluoromethylpyridinium salts is seldom explored because of their instability and low availability. Here we present a novel nucleophilic addition of N-difluoromethylpyridinium salts with nitroalkanes to synthesize N-CF2H-dihydropyridines and N-CHO-dihydropyridines in a highly efficient and regioselective pathway. This protocol exhibits good functional group tolerance and good to excellent yields.
According to the invention, compounds of the general formula (I) or salts thereof (pyridine-2-oxy-3-carboxamides),
in which R
1
is a (C
1
-C
4
)-haloalkyl radical can be employed as safeners, i.e. as agents for preventing or reducing phytotoxic effects of pesticides, preferably herbicides, on useful plants.
PYRIDINECARBOXAMIDES, USEFUL-PLANT-PROTECTING COMPOSITION COMPRISING THEM AND PROCESSES FOR THEIR PREPARATION AND THEIR USE
申请人:ZIEMER Frank
公开号:US20120252670A1
公开(公告)日:2012-10-04
Compounds of the formula (I), or salts thereof,
in which R
1
to R
4
are as defined in formula (I) of claim
1
are suitable as useful-plant-protecting agents for reducing or preventing harmful effects of agrochemicals on the useful plants and their method of preparation are described.