A diverse set of highly substituted 4‐aminoquinolines was synthesized from ynamides, triflic anhydride, 2‐chloropyridine, and readily accessible amides in a mild one‐step procedure.
Copper-Catalyzed Ficini [2 + 2] Cycloaddition of Ynamides
作者:Hongyan Li、Richard P. Hsung、Kyle A. DeKorver、Yonggang Wei
DOI:10.1021/ol101418d
日期:2010.9.3
The Ficini [2 + 2] cycloaddition using N-sulfonyl-substituted ynamides is described, featuring the utility of CuCl2 and AgSbF6 as catalysts. This work represents the first successful example of ynamides participating in a thermal [2 + 2] cycloaddition with enones.
A palladium-catalyzed regioselective three-componentcoupling of ynamides was developed. The reaction proceeded smoothly to furnish the desired products when carried out at 70 °C in acetonitrile/water with potassium carbonate in the presence of 2.5 mol % Pd2(dba)3·CHCl3 without a ligand. Various iodides and boronic acids were used in this reaction, and a carbon–carbon bond was formed with satisfactory
Copper-Mediated Selective Cross-Coupling of 1,1-Dibromo-1-alkenes and Heteronucleophiles: Development of General Routes to Heterosubstituted Alkynes and Alkenes
site-selective, double, or alkynylative cross-coupling, therefore providing divergent and straightforward entries to numerous building blocks such as bromoenamides, ynamides, ketene N,N-acetals, bromoenol ethers, ynol ethers, keteneO,O-acetals, or vinylphosphonates and further expanding the copper catalysis toolbox with useful and versatile processes.
A TMSOTf-catalyzed hydroalkoxylation of ynesulfonamides with esters is described for the efficient synthesis of alkoxy-substituted enamides with high stereoselectivity.