Visible-Light-Mediated α-Arylation of Enol Acetates Using Aryl Diazonium Salts
作者:Thea Hering、Durga Prasad Hari、Burkhard König
DOI:10.1021/jo301984p
日期:2012.11.16
light mediates efficiently the α-arylation of enol acetates by aryl diazonium salts under mild conditions using [Ru(bpy)3]Cl2 as a photoredox catalyst. The broad scope of the reaction toward various diazonium salts and enol acetates was explored. The application of this reaction in the concise synthesis of 2-substituted indoles was demonstrated
Highly efficient AgBF4-catalyzed synthesis of methyl ketones from terminal alkynes
作者:Zheng-Wang Chen、Dong-Nai Ye、Yi-Ping Qian、Min Ye、Liang-Xian Liu
DOI:10.1016/j.tet.2013.05.057
日期:2013.7
A silver-catalyzed highlyefficient synthesis of a wide range of methyl ketones from terminalalkynes is described. The reactions are conducted under convenient conditions and provide products with excellent regioselectivity in moderate to excellent yields, with broad substrate scope, including a variety of aromatic and aliphatic terminalalkynes.
Formation of δ-Lactones with <i>anti</i>
-Baeyer-Villiger Regiochemistry: Investigations into the Mechanism of the Cerium-Catalyzed Aerobic Coupling of β-Oxoesters with Enol Acetates
The cerium-catalyzed, aerobic coupling of β-oxoesters with enol acetates and dioxygen yields δ-lactones with a 1,4-diketone moiety. In contrast to the Baeyer-Villiger oxidation (BVO), where the higher substituted residue migrates, in this case of an oxidative C-C coupling reaction the less substituted alkyl residue undergoes a 1,2-shift. An endoperoxidic oxycarbenium ion comparable to the Criegee intermediate
Salicylic Acid‐Catalyzed Arylation of Enol Acetates with Anilines
作者:Diego Felipe‐Blanco、Jose C. Gonzalez‐Gomez
DOI:10.1002/adsc.201800427
日期:2018.7.16
α‐Arylketones are both structure moieties commonly found in bioactive compounds and versatile synthetic intermediates for the preparation of drug‐like molecules. An operationally simple and scalable protocol has been developed to prepare α‐arylketonesfrom readily available aromatic amines and enolacetates (or silyl enol ethers). This metal‐free methodology features the use of salicylic acid as