New conjugated dienamides via palladium-catalyzed selective aminocarbonylation of enynes
作者:S.M. Shakil Hussain、Rami Suleiman、Bassam El Ali
DOI:10.1016/j.tetlet.2012.09.084
日期:2012.11
have been synthesized effectively viapalladium-catalyzedaminocarbonylation of enynes in the presence of various amines, diaminoalkanes, and aminoalcohols. The products have been utilized as substrates in alkoxycarbonylation reactions using methanol as the nucleophile and Pd(PPh3)2Cl2 as the catalyst to afford novel ω-amidoesters in high yields and selectivities. Interestingly, the product obtained
A direct and selective synthesis of α,β-unsaturated piperidones by a new palladium-catalyzed cascade carbonylation is described. In the presented protocol, easily available propargylic alcohols react with aliphatic amines to provide a broad variety of interesting heterocycles. Key to the success of this transformation is a remarkable catalytic cleavage of the present carbon–carbon triple bond by using