Morita–Baylis–Hillman acetates of acetylenic aldehydes: versatile synthons for substituted pyrroles via a metal-free tandem reaction
作者:Chada Raji Reddy、Motatipally Damoder Reddy、Boinapally Srikanth、Kothakonda Rajendra Prasad
DOI:10.1039/c1ob05402c
日期:——
A mild and metal-free access to 1,2,4-tri or 1,2,4,5-tetrasubstituted pyrroles has been developed by the reaction of MoritaâBaylisâHillman acetates of acetylenic aldehydes with amines and sulfonamides. This new protocol is based on K2CO3-promoted tandem allylic substitution/cycloisomerization reactions.
通过乙炔醛的 MoritaâBaylisâHillman 乙酸酯与胺和磺酰胺的反应,开发出了一种温和、无金属的 1,2,4- 三或 1,2,4,5- 四取代吡咯。这一新方案基于 K2CO3 促进的串联烯丙基取代/环异构化反应。