Substituent effects of the trifluoromethyl group on electrophilic additions to alkenes. Solvolysis of the trifluoromethyl group. Protonation of alkenes less basic than ethylene, .rho.+ values of deactivated styrenes, and reactivity-selectivity effects
[EN] PROCESS FOR PREPARING SUBSTITUTED ISOXAZOLINE COMPOUNDS AND THEIR PRECURSORS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE COMPOSÉS ISOXAZOLINE SUBSTITUÉS ET DE LEURS PRÉCURSEURS
申请人:BASF SE
公开号:WO2010125130A1
公开(公告)日:2010-11-04
Process for preparing substituted isoxazoline compounds and their precursors The present invention relates to a new method of preparing halogenated styrene compounds of Formula (VIII), which are precursors in the process of synthesis of substituted isoxazoline compounds of Formula (I), wherein R1 to R5, R8 and R9 are described as in the description. The present invention relates further to the synthesis of compounds of formula (I) starting from acetophenones. The desired styrenes of formula are prepared from the appropriate substituted acetophenone. Asides bromo anilines react with formoxime. Obtained oximes undergo a cycloaddition with the styrenes and give isoxazolines. Compounds of formula (I) can then be prepared in a palladium catalyzed carbonylative ami- nation reaction of the isoxazolines.
Visible-Light-Mediated C–I Difluoroallylation with an α-Aminoalkyl Radical as a Mediator
作者:Fuyang Yue、Jianyang Dong、Yuxiu Liu、Qingmin Wang
DOI:10.1021/acs.orglett.1c02905
日期:2021.9.17
for direct visible-light-mediated C–I difluoroallylation reactions of α-trifluoromethyl arylalkenes with alkyliodides at room temperature with an α-aminoalkyl radical as a mediator. The protocol permits efficient functionalization of various α-trifluoromethyl arylalkenes with cyclic and acyclic primary, secondary, and tertiary alkyliodides and is scalable to the gram level. This mild protocol uses
Photoredox relay-catalyzed <i>gem</i>-difluoroallylation of alkyl iodides
作者:Yuanqiang Guo、Yunpeng Cao、Hongjian Song、Yuxiu Liu、Qingmin Wang
DOI:10.1039/d1cc04284j
日期:——
photocatalyst catalyze the reaction at different stages in the desired sequence under the same reaction conditions, and do not inhibit each other. This convenient method transforms a broad scope of alkyliodides into the corresponding gem-difluoroalkenes via C(sp3)–C(sp3) bond construction. The protocol has good functional group tolerance and is suitable for the late-stage modification of multifunctional
Photoredox/Hydrogen Atom Transfer Cocatalyzed C–H Difluoroallylation of Amides, Ethers, and Alkyl Aldehydes
作者:Yuan-Qiang Guo、Yifan Wu、Ruiguo Wang、Hongjian Song、Yuxiu Liu、Qingmin Wang
DOI:10.1021/acs.orglett.1c00546
日期:2021.3.19
Herein, we report a method that combines hydrogen atom transfer and photoredox catalysis to achieve the dehydrogenative difluoroallylation of amides, ethers, and alkyl aldehydes. This operationally convenient method transforms a broad scope of substrates into the corresponding gem-difluoroalkenes via the construction of C(sp3)–C(sp3) or C(sp3)–C(sp2) bonds. Excellent functional group compatibility
The invention is directed to arylpyrrolidines compounds which exhibit excellent insecticidal efficacy and which may be used as in the agrochemical field or in the yield of veterinary medicine. The compounds are represented by formula (I): wherein the respective substituents are defined in the specification.