A Short Synthesis of 2,3,5-Trisubstituted Pyrroles by an Alkylation/Dehydrocyanation Sequence
作者:Till Opatz、Murat Kucukdisli、Marco M. Nebe、Solveig M. Bartelt
DOI:10.3987/com-15-s(t)15
日期:——
2,3,5-Trisubstituted pyrroles were prepared in a one-pot procedure from readily available 3,5-disubstituted 3,4-dihydro-2H-pyrrole-2-carbonitriles by an alkylation/dehydrocyanation sequence. The method was also applied to a,co-dihaloalkanes to furnish dipyrroles tethered with an alkyl spacer.
One-pot highly efficient synthesis of substituted pyrroles and N-bridgehead pyrroles by zinc-catalyzed multicomponent reaction
developed for the synthesis of substituted pyrrole derivatives from propargylic acetates, enoxysilanes and primary amines. Various aromatic and aliphatic propargylic acetates participate well in the reaction, providing the propargylation/amination/cycloisomerization products in good yields with complete regioselectivity. The one-pot multicomponent coupling reaction furnishes substituted pyrroles in high