Efficient Synthetic Method for β-Enamino Esters Catalyzed by Yb(OTf)3 under Solvent-Free Conditions
作者:Ravi Varala、Sreelatha Nuvula、Srinivas R. Adapa
DOI:10.1071/ch06239
日期:——
esters have been synthesized in moderate to excellent yields by reacting 1,3-dicarbonyl compounds with amines in the presence of catalytic amounts of Yb(OTf)3 (2 mol%). The reaction proceeds smoothly at ambient temperature undersolvent-freeconditions. The catalyst can be recovered and reused.
A General and Efficient Method for the Preparation of β-Enamino Ketones and Esters Catalyzed by Indium Tribromide
作者:Zhan-Hui Zhang、Liang Yin、Yong-Mei Wang
DOI:10.1002/adsc.200505268
日期:2006.1
A variety of β-enaminoketones and esters have been synthesized in high to exellent yields by reacting β-dicarbonyl compounds with amines in the presence of a catalytic amount of indiumtribromide. The reaction proceeds smoothly at room temperature in a short reaction time under solvent-free conditions.
An Easy Synthesis of Enaminones in Water as Solvent
作者:Hélio A. Stefani、Iguatemi M. Costa、Diogo de O. Silva
DOI:10.1055/s-2000-7608
日期:——
Enaminones were prepared from β-ketoesters or 1,3-diketones and primary amines in water als solvent.
烯丙酮是由δ-酮或 1,3-二酮和伯胺在水溶剂中制备而成。
Preparation of 3-azabicyclo [3.2.0] heptenones by intramolecular [2+2] cycloaddition
作者:Fariba Arya、James Bouquant、Josselin Chuche
DOI:10.1016/s0040-4039(00)84409-3
日期:1986.1
Pyrolysis of N-allyl enaminoesters is a general method for the stereoselective synthesis of 3-azabicyclo[3.2.0] heptenones ; the reaction involves a [2+2] intramolecularcycloaddition of an intermediate iminoketene.
Solvent-Free and Stereoselective Synthesis of C-Glycosides by Michael-Type Addition of Enamino Esters to 2-Nitro-d-glucal
作者:Chu-Yi Yu、Zhi-Tang Huang、Ti Zhang、Yue-Mei Jia
DOI:10.1055/s-0030-1258498
日期:2010.9
Michael-type addition of enamino esters to 3,4,6-tri-O-benzyl-2-nitro-d-glucal under solvent-free conditions formed C-glycosides in excellent yields with high stereoselectivity. Reduction of the nitro group afforded the corresponding bicyclic 2-amino C-glycosides.