A novel method of metal-free dehydrogenative silylation of enamides has been developed. The desired functionalized vinylsilane products were obtained in moderate to good yield and with high stereoselectivities. This protocol displays good tolerance of various functionalities. Furthermore, the high chemoselectivity of this reaction enables us to introduce different unsaturated C-C moieties to the products
A novel optically active bisphosphine ligand CDP, derived from an anti head-to-head coumarin dimer: synthesis and application to the rhodium-catalyzed asymmetric hydrogenation of arylenamides
A novel optically active bisphosphine ligand CDP containing a C-2-symmetric cyclobutane ring was prepared from an enantiopure anti head-to-head coumarin dimer. CDP was successfully applied to the rhodium-catalyzed asymmetric hydrogenation of arylenamides, affording the corresponding amides up to 93% e.e. (C) 1998 Elsevier Science Ltd. All rights reserved.
Kathodische Reduktion von ?-Azidostyrolen
作者:Dierk Knittel
DOI:10.1007/bf00799159
日期:1984.5
Ruthenium-Catalyzed Formal Dehydrative [4 + 2] Cycloaddition of Enamides and Alkynes for the Synthesis of Highly Substituted Pyridines: Reaction Development and Mechanistic Study
作者:Jicheng Wu、Wenbo Xu、Zhi-Xiang Yu、Jian Wang
DOI:10.1021/jacs.5b06400
日期:2015.7.29
Reported herein is a ruthenium-catalyzed formal dehydrative [4 + 2] cycloaddition of enamides and alkynes, representing a mild and economic protocol for the construction of highly substitutedpyridines. Notably, the features of broad substrate scope, high efficiency, good functional group tolerance, and excellent regioselectivities were observed for this reaction. Density functional theory (DFT) calculations
Electrochemically Induced Regio‐ and Stereoselective (
<i>E</i>
)‐β‐C(
<i>sp</i>
<sup>2</sup>
)−H Trifluoromethylation and Arylsulfonylation of Enamides
作者:Fukuan Zhang、Xuefei Zhao、Jie Zhang、Lili Zhao、Lin Li、Jiayi Yang、Hao Li、Haiqing Luo
DOI:10.1002/adsc.202200934
日期:2022.12.8
electrochemically induced method for the regio- and stereoselective (E)-β-C(sp2)−H trifluoromethylation of enamides by employing readily available and inexpensive Langlois’ reagent (CF3SO2Na). Preliminary mechanistic studies indicate the involvement of free radicals in the process. The exogenous oxidant-free reaction proceeds in an undivided electrochemical cell under mild conditions and allows for the accomplishment
在此,我们公开了一种电化学诱导的区域选择性和立体选择性 ( E )-β-C( sp 2 )-H 三氟甲基化的方法,使用现成且廉价的 Langlois 试剂 (CF 3 SO 2 Na)。初步的机理研究表明自由基参与了这个过程。无外源氧化剂的反应在温和条件下在未分隔的电化学电池中进行,并允许通过独家E选择性控制完成三氟甲基化产物。该方法的特点是无催化剂、设置简单、烯酰胺底物范围广、官能团耐受性好。使用 ArSO 2Na 作为偶联配偶体,在标准反应条件下得到相应的 ( E )-β-C( sp 2 )−H 芳基磺酰化烯酰胺产物。