这项研究描述了在光照射下铁催化苯乙烯发散氧化成β-羟甲基酮和酮。这种差异归因于使用具有各种取代基的苯乙烯。更重要的是,甲醇在反应中被氧化成甲醛并充当C1合成子。机理研究表明该反应是由氧化SET引发的,将苯乙烯转移到阳离子自由基中。该反应途径经历 HAT 和 β-氢化物消除以及协同环化。特别地,合成了几种药物样分子,例如美哌隆类似物、伦哌隆类似物和氟哌啶醇类似物。此外,该方法还适用于天然产物( R )-阿托莫西汀的合成。
The hydration of α,β‐unsaturatedketones with water proceeded efficiently in the presence of In(OTf)3 (20 mol%) in aqueous media to afford synthetically versatile β‐hydroxyketones in moderate to good yields with good functional group compatibility. The method also can be extended to the hydroalkoxylation of α,β‐unsaturatedketones with various alcohols for the efficient synthesis of β‐alkoxyketones as
Chromium(III)-Catalyzed Addition of Water and Alcohol to α,β-Unsaturated Ketones for the Synthesis of β-Hydroxyl and β-Alkoxyl Ketones in Aqueous Media
An efficient chromium(III) chloride-catalyzed Michael-type reaction of water or alcohol with α,β-unsaturatedketones is developed. A variety of α,β-unsaturatedketones effectively reacted with either water or alcohols to give the corresponding β-hydroxyl ketones or β-alkoxyl ketones in modest to high yields with excellent compatibility to various functional groups. The approach was further utilized
Abstract An efficient method was developed for the conjugate addition of water to various α,β-unsaturatedketones by using bismuth(III) chloride as a catalyst. The reactions proceeded smoothly in the presence of a catalytic amount of BiCl3 (20 mol%) in aqueous media to furnish a variety of synthetically useful β-hydroxyl ketones in moderate to good yields. Apart from water molecule, various alcohols
A combined computational and experimental investigation of the oxidative ring-opening of cyclic ethers by oxoammonium cations
作者:Jacob. J. Loman、Emma R. Carnaghan、Trevor A. Hamlin、John M. Ovian、Christopher B. Kelly、Michael A. Mercadante、Nicholas E. Leadbeater
DOI:10.1039/c6ob00347h
日期:——
The propensity of oxoammonium cations to facilitate the oxidative ring-opening of cyclic ethers to their corresponding distal hydroxy ketones is investigated. The reaction has been evaluated using experimental and computational methods to gain deeper insight into trends in reactivity.
Efficient one-pot selective reduction of esters in β-ketoesters using LiHMDS and lithium aluminium hydride
作者:K. Sivagurunathan、S. Raja Mohamed Kamil、S. Syed Shafi、F. Liakth Ali Khan、R. Venkat Ragavan
DOI:10.1016/j.tetlet.2011.01.030
日期:2011.3
The ester functionality in β-keto esters is selectively reduced in one-pot, first by enolization using LiHMDS and then reduced with lithium aluminium hydride. This method produces β-hydroxyl ketones from the corresponding β-keto esters in high yield.