Erbium(III) triflate is a powerfulcatalyst for the acylation of alcohols and phenols. The reaction works well for a large variety of simple and functionalized substrates by using different kinds of acidicanhydrides Ac2O, (EtCO)2O, [(CH3)3CO]2O, Bz2O, and (CF3CO)2O} without isomerisation of chiral centres. Moreover, the catalyst can be easily recycled and reused without significant loss of activity
The ester enolate Claisen rearrangement. Stereochemical control through stereoselective enolate formation
作者:Robert E. Ireland、Richard H. Mueller、Alvin K. Willard
DOI:10.1021/ja00426a033
日期:1976.5
An acyl-Claisen/Paal-Knorr approach to fully substituted pyrroles
作者:Nora Dittrich、Eun-Kyung Jung、Samuel J. Davidson、David Barker
DOI:10.1016/j.tet.2016.06.049
日期:2016.8
The synthesis of fully substituted pyrroles using the Paal-Knorr reaction on acyl-Claisen derived 2,3-syn-disubstituted-1,4-diketones is reported. The use of the acyl-Claisen rearrangement allows the synthesis of wide variety of syn-substituted 1,4-diketones which are shown to be better substrates for pyrrole condensation than their corresponding anti isomers. When the reaction was performed open to
Erbium(III) Chloride: a Very Active Acylation Catalyst
作者:Renato Dalpozzo、Antonio De Nino、Loredana Maiuolo、Manuela Oliverio、Antonio Procopio、Beatrice Russo、Amedeo Tocci
DOI:10.1071/ch06346
日期:——
Erbium(iii) chloride is a powerfulcatalyst for the acylation of alcohols and phenols. The reaction works well for a large variety of simple and functionalized substrates by using different kinds of acidicanhydrides (Ac2O, (EtCO)2O, (PriCO)2O, (ButCO)2O, and (CF3CO)2), without isomerization of chiral centres. Moreover, the catalyst can be easily recycled and reused without significant loss of activity