Gold-Catalyzed Multicomponent Synthesis of Aminoindolizines from Aldehydes, Amines, and Alkynes under Solvent-Free Conditions or in Water
作者:Bin Yan、Yuanhong Liu
DOI:10.1021/ol701886e
日期:2007.10.1
A goid(III)-catalyzed multicomponent coupling/cycloisomerization reaction of heteroaryl aldehydes, amines, and alkynes under solvent-free conditions or in water has been developed. This methodology provides rapid access to substituted aminoindolizines with high atom economy and high catalytic efficiency. Especially, the coupling of enantiomerically enriched amino acid derivatives produces the corresponding N-indolizine-incorporated amino acid derivatives without loss of enantiomeric purity.
The Eschenmoser's Salt as a Formylation Agent for the Synthesis of Indolizinecarbaldehydes and Their Use for Colorimetric Nitrite Detection
作者:Teresa Antón‐Cánovas、Francisco Alonso
DOI:10.1002/anie.202215916
日期:2023.1.23
We report the unprecedented use of the Eschemoser's salt—a well-known and commercial reagent for (dimethylamino)methylation reactions—as a formylation agent of indolizines. The method is simple and mild, whereas the classical formylation methods failed. Moreover, some indolizinecarbaldehydes have been transformed into highly conjugated push-pull dyes and have proven to be selective and sensitive colorimetric