Silver-catalyzed decarboxylative cross-coupling of α-keto acids with alkenes giving approach to chalcones
摘要:
A silver-catalyzed decarboxylative cross-coupling of alpha-keto acids with alkenes is reported. The method, with a wide range of substrate tolerance and mild operational conditions, can produce various chalcone derivatives in moderate to high yields from easily available starting materials. (C) 2017 Elsevier Ltd. All rights reserved.
The first generalpalladium-catalyzedcarbonylative vinylation of aryl halides with olefins in the presence of CO has been developed. Applying a catalyst system consisting of [(cinnamyl)PdCl](2) and bulky imidazolyl-phosphine ligand L1 allows for the efficient and selective synthesis of α,β-unsaturated ketones under mild reaction conditions. Starting from easily available aryl halides and olefins,
在 CO 存在下,第一个通用钯催化的芳基卤化物与烯烃的羰基化乙烯基化已经被开发出来。应用由 [(肉桂基)PdCl](2) 和庞大的咪唑基膦配体 L1 组成的催化剂体系,可以在温和的反应条件下高效和选择性地合成 α,β-不饱和酮。从容易获得的芳基卤化物和烯烃开始,可以以简单的方式制备通用的结构单元。证明了这种新协议的通用性和功能组耐受性。
Visible Light Activated Radical Denitrative Benzoylation of<i>β</i>-Nitrostyrenes: A Photocatalytic Approach to Chalcones
作者:Shubhangi Tripathi、Ritu Kapoor、Lal Dhar S. Yadav
DOI:10.1002/adsc.201701559
日期:2018.4.3
A metal‐free, convenient photocatalytic approach to chalcones from β‐nitrostyrenes and benzaldehydes via a radical denitrative benzoylation pathway is reported. The salient features of the protocol include the utilization of visible light as an inexpensive and ecosustainable energy source, N‐hydroxyphthalimide (NHPI) as a reusable organophotocatalyst and acetonitrile as an acceptable green solvent
Copper-Catalyzed Oxidative Coupling of Alkenes with Aldehydes: Direct Access to α,β-Unsaturated Ketones
作者:Jing Wang、Chao Liu、Jiwen Yuan、Aiwen Lei
DOI:10.1002/anie.201208920
日期:2013.2.18
Let's get radical: The first copper‐catalyzedoxidative coupling of alkenes and aldehydes was developed. Various aldehydes were utilized as substrates to construct α,β‐unsaturated ketones. A preliminary mechanistic study indicated that this reaction is likely to proceed through a single‐electron transfer.