metal-free reaction condition. Various aryl ketone derivatives react readily with DMSO, producing the α,β-unsaturatedcarbonylcompounds in yields of 42 to 90%. This method features a transition metal-free reaction condition, wide substrate scope and using DMSO as novel one-carbon source to form C═C bond, thus providing an efficient and expeditious approach to an important class of α,β-unsaturated carbonyl
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
Photocatalytic C(
<i>sp</i>
<sup>3</sup>
)−H Activation towards α‐methylenation of Ketones using MeOH as 1 C Source Steering Reagent
作者:Fooleswar Verma、Prashant Shukla、Smita R. Bhardiya、Manorama Singh、Ankita Rai、Vijai K. Rai
DOI:10.1002/adsc.201801431
日期:2019.3.15
direct access to terminal enones via α‐methylenation of aryl ketones to form C=C bond is achieved under visible‐light conditions using methanol as one carbon source substrate and solvent as well. The reaction involves Cu@g‐C3N4‐catalysed in situ oxidation of methanol into formaldehyde followed by dehydrative cross aldol type reaction. Various aryl ketones react efficiently with MeOH, producing α,β‐unsaturated
Ruthenium-catalyzed ortho-C–H bond alkylation of aromatic amides with α,β-unsaturated ketones via bidentate-chelation assistance
作者:Guy Rouquet、Naoto Chatani
DOI:10.1039/c3sc50310k
日期:——
chelation assisted reaction using a removable 8-aminoquinoline bidentate directing group that permits the ruthenium-catalyzed ortho-C–H bond alkylation of aromatic amides with various α,β-unsaturated ketones under straightforward conditions has been developed. This methodology represents the first efficient utilization of enones in the ortho directed ruthenium-catalyzed addition of C–H bonds to C–C double bonds