据报道,使用N-甲氧基酰胺进行了铜催化的芳基三氟硼酸酯的亲电酰胺化反应。该反应显示出源自两个明显特征的高官能团相容性:1)N-甲氧基酰胺的高稳定性,以及2)在LiCl存在下的非碱性温和条件。所开发的方法还可以用于合成广泛分布于天然产物中的烯酰胺。初步的机理研究表明,第一步是在LiCl的协助下对三氟硼酸芳基酯进行金属转移,生成的芳基铜中间体通过非S N 2氧化添加至N-甲氧基酰胺并随后进行还原消除而提供了苯胺。
A silver‐mediated oxidative difluoromethylation of styrenes and vinyl trifluoroborates with TMSCF2H is reported for the first time. This method enables direct and facile access to CF2H‐alkenes from abundant alkenes with excellent functional‐group compatibility. Moreover, this Ag/TMSCF2H protocol could further enable a series of radical difluoromethylation reactions of a wide array of substrates, offering
Catalytic Hydrogenation of Amides to Amines under Mild Conditions
作者:Mario Stein、Bernhard Breit
DOI:10.1002/anie.201207803
日期:2013.2.18
Under (not so much) pressure: A general method for the hydrogenation of tertiary and secondary amides to amines with excellent selectivity using a bimetallic Pd–Re catalyst has been developed. The reaction proceeds under low pressure and comparatively low temperature. This method provides organic chemists with a simple and reliable tool for the synthesis of amines.
Selective formation of α,ω-ester amides from the aminocarbonylation of castor oil derived methyl 10-undecenoate and other unsaturated substrates
作者:Cristina Jiménez-Rodriguez、Angel A. Núñez-Magro、Thomas Seidensticker、Graham R. Eastham、Marc R. L. Furst、David J. Cole-Hamilton
DOI:10.1039/c4cy00158c
日期:——
The reaction of long chain alkenes with CO and aniline in the presence of palladium complexes of 1,2-bis-(ditertbutylphosphinomethyl)benzene produces amides with high linear selectivity, with much higher rates and catalyst stability when 2-naphthol and sodium or potassiumiodide are added. Unsaturated esters including methyl 10-undecenoate from castor oil give α,ω-ester amides, whilst reactions in THF
We have presented the first palladium(II)‐thiadiazole‐ligand catalytic system, employing 1,3,4‐thiadiazole derivative as ligand to achieve the esterification of terminal olefin with excellent regio‐ and stereoselectivity. This work is significant in that it represented the first application of 1,3,4‐thiadiazole in organic synthesis. Furthermore, it was also featured by its satisfied yields, mild reaction
Palladium‐Catalyzed Perfluoroalkylative Carbonylation of Unactivated Alkenes: Access to β‐Perfluoroalkyl Esters
作者:Youcan Zhang、Hui‐Qing Geng、Xiao‐Feng Wu
DOI:10.1002/anie.202111206
日期:2021.11.2
An efficient and convenient palladium-catalyzed perfluoroalkylative carbonylation of unactivatedalkenes has been developed. More than 100 examples of β-perfluoroalkyl esters were prepared directly from readily available substrates with good functional group tolerance and chemoselectivity.