Palladium nanocrystals stabilized by cucurbit[6]uril as efficient heterogeneous catalyst for direct C–H functionalization of polyfluoroarenes
摘要:
Palladium nanocrystals (Pd NCs) featuring abundant surface defects are successfully synthesized by using cucurbit[6]uril as a stabilizer. Employing the as-prepared Pd NCs as catalyst, an efficient approach to the direct C-H functionalization of electron-deficient polyfluoroarenes has been developed. The stable Pd NCs catalyst exhibits excellent catalytic activity and good recyclability with significantly low catalyst loading. The catalytic procedure is insensitive to air and moisture and can be manipulated under ambient environment with operational ease. Mechanistic experiments have provided credible data to support a heterogeneous catalytic mechanism of the present system. (C) 2014 Elsevier Inc. All rights reserved.
[1,1'-Biphenyl]-3-ylmethyl pyrethroid esters, as well as processes, uses, and intermediates thereto, are disclosed. The [1,1'-biphenyl]-3-ylmethyl pyrethroid esters control a broad spectrum of insects as well as acarids.
[1,1'-Biphenyl]-3-ylmethyl pyrethroid esters, as well as processes, uses, and intermediates thereto, are disclosed. The [1,1'-biphenyl]-3-ylmethyl pyrethroid esters control a broad spectrum of insects as well as acarids.
Palladium-Catalyzed Direct Arylation of Electron-Deficient Polyfluoroarenes with Arylboronic Acids
作者:Ye Wei、Jian Kan、Min Wang、Weiping Su、Maochun Hong
DOI:10.1021/ol901200g
日期:2009.8.6
The palladium-catalyzeddirectarylation of electron-deficient arenes that contain two or more fluorine groups with arylboronic acids was realized. The key to achieving a broad substrate scope with respect to both polyfluorobenzenes and arylboronic acids is the choice of bases depending on acidities of polyfluorobenzenes.
Pd-catalyzed direct arylation of electron-deficient polyfluoroarenes with aryliodine(III) diacetates
作者:Zhengjiang Fu、Qiheng Xiong、Wenbiao Zhang、Zhaojie Li、Hu Cai
DOI:10.1016/j.tetlet.2014.11.033
日期:2015.1
polyfluoroarenes with readily available aryliodine(III) diacetates was developed with moderate to good yields. The process exhibited good functional tolerance with respect to methyl, methoxy, bromo, chloro, trifluoromethyl, cyano, and aldehyde groups. Mechanistic studies revealed this coupling involved in situ generation of aryl iodide from heating-promoted decomposition of aryliodine(III) diacetate, followed by
Insecticidal (1,1'-biphenyl)-3-ylmethyl esters, their production and use and compositions containing them
申请人:FMC Corporation
公开号:EP0049977A1
公开(公告)日:1982-04-21
Insecticidal and acaricidal pyrethroid esters of formula residue is replaced by a hydroxy group or a leaving group readilv displaced bv carboxylate anions are also novel.
in which R is one of certain substituted cyclopropyl radicals, A and B are certain halo, haloalkyl, alkyl and alkoxy radicals and a and b are 0, 1, 2, 3, 4 or 5, are novel and may be included in insecticidal and acaricidal compositions and used for killing insects and acarids. They can be in cis or trans configuration.
Intermediate compounds in which the
杀虫和杀螨剂拟除虫菊酯的式残基被羟基或羧酸阴离子取代的离去基团也是新颖的。
其中 R 是某些取代的环丙基之一,A 和 B 是某些卤代、卤代烷基、烷基和烷氧基,a 和 b 是 0、1、2、3、4 或 5,这些都是新型的,可包含在杀虫和杀螨组合物中,用于杀虫和杀螨。它们可以是顺式或反式构型。
其中