Expedient Synthesis of 1,5-Diketones by Rhodium-Catalyzed Hydroacylation Enabled by C–C Bond Cleavage
作者:Rui Guo、Guozhu Zhang
DOI:10.1021/jacs.7b05427
日期:2017.9.20
A rhodium-catalyzedintermolecularhydroacylationreaction of vinyl cyclobutanols with non-chelating aldehydes has been developed. This reaction offers a new and atom-economical approach for the selective preparation of 1,5-diketones in high yields. Experimental data suggest a sequential ring-opening, transfer hydrogenation, and hydroacylation mechanism. We propose that aldehyde decarbonylation is
One-pot synthesis of Robinson annulated 3-aryl-cyclohexenones from allyl alcohols and ketones using palladium is reported. Long chain aliphatic or aryl substitutions at the C1 position of allyl alcohol result in the formation of 1,5-diketone products. This simple one-pot method avoids the use of highly electrophilic vinyl ketones.
AHLBRECHT H.; DIETZ M.; WEBER L., SYNTHESIS,(1987) N 3, 251-254
作者:AHLBRECHT H.、 DIETZ M.、 WEBER L.
DOI:——
日期:——
1,5-Dicarbonyl-Verbindungen durch Michael-Addition deprotonierter Enamine und Allylamine an 2-(<i>N</i>-Methylanilino)-acrylnitril
作者:Hubertus Ahlbrecht、Manfred Dietz、Lothar Weber
DOI:10.1055/s-1987-27904
日期:——
1,5-Dicarbonyl Compounds via Michael-Addition of Deprotonated Enamines and Allylamines to 2-(N-Methylanilino) acrylonitrile A new method for the synthesis of the title compounds by a onepot, three component, coupling reaction is described. Is consists of the reaction of a homoenolate anion and an enol cation equivalent with subsequent alkylation of an acyl-anion equivalent. Hence the methodology of Umpolung is used in a threefold manner within the reaction sequence.