ZnCl2-catalyzed chemoselective cascade reactions of enaminones with 2-furylcarbinols: a versatile process for the synthesis of cyclopenta[b]pyrrole derivatives
Abstract An efficient copper-catalyzedselectivesynthesis of highly functionalized pyridones by the reaction of enaminones with alkynes is reported. The reactions proceed to afford polysubstituted pyridone derivatives in good to high yields using CuI as the catalyst in MeCN under nitrogen. An efficient copper-catalyzedselectivesynthesis of highly functionalized pyridones by the reaction of enaminones
bridging of enaminones and synthesis of 1,4-dihydropyridines, respectively. n-Butylamine significantly promoted this CO2 deoxymethylenation procedure catalyzed by 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) and ZnCl2. The mechanism involving the formation of bis(silyl)acetal, nucleophilicaddition, and amine elimination was also interpreted to clarify the bridging of two molecules of enaminones with CO2
ZnCl<sub>2</sub>-catalyzed chemoselective cascade reactions of enaminones with 2-furylcarbinols: a versatile process for the synthesis of cyclopenta[b]pyrrole derivatives
作者:Chengyu Wang、Chunyi Dong、Lingkai Kong、Yanli Li、Yanzhong Li
DOI:10.1039/c3cc49191a
日期:——
A ZnCl2-catalyzed cascade reaction of enaminones with 2-furylcarbinols offers a chemo- and diastereo-selective access to functionalized cyclopenta[b]pyrrole derivatives.