Palladium-Catalyzed Asymmetric Allylic Alkylation of 2-Acylimidazoles as Ester Enolate Equivalents
作者:Barry M. Trost、Konrad Lehr、David J. Michaelis、Jiayi Xu、Andreas K. Buckl
DOI:10.1021/ja103771w
日期:2010.7.7
A broad range of highly enantioenriched 2-acylimidazoles are synthesized by palladium-catalyzed decarboxylative asymmetricallylicalkylation (DAAA) of 2-imidazolo-substituted enol carbonates. The enantioenriched 2-acylimidazole products can easily be converted to the corresponding carboxylic acid, ester, amide, and ketone derivatives with complete retention of the enantiopurity. The synthetic utility
Catalytic asymmetric C–H activation by methyl thiophen-3-yldiazoacetate applied to the synthesis of (+)-cetiedil
作者:Huw M.L Davies、Abbas M Walji、Robert J Townsend
DOI:10.1016/s0040-4039(02)00956-5
日期:2002.7
Dirhodium tetraprolinate catalyzed reaction of methyl thiophen-3-yldiazoacetate results in intermolecular allylic C–H activation by means of rhodiumcarbenoid induced C–Hinsertion. The reaction with 1,4-cyclohexadiene was applied to the asymmetric synthesis of (+)-cetiedil.