An efficient synthesis of polysubstituted pyrroles via copper-catalyzed coupling of oxime acetates with dialkyl acetylenedicarboxylates under aerobic conditions
An efficient synthesis of polysubstituted pyrroles via copper-catalyzed coupling of oxime acetates with dialkyl acetylenedicarboxylates under aerobic conditions
Gold-catalysed rearrangement of O-vinyl oximes for the synthesis of highly substituted pyrroles
作者:Simbarashe Ngwerume、Jason E. Camp
DOI:10.1039/c0cc04372a
日期:——
O-Vinyl oximes were synthesised from the reaction of oximes with activated alkynes and subsequently rearranged using gold catalysis to afford highly substituted pyrroles in an efficient and regiocontrolled process. Additionally, pyrroles were formed directly from oximes and activated alkynes in a multifaceted catalysis process.
Reactions of a 2H-azirine with electron-rich olefins; synthesis of dimethyl pyrrole-2,3-dicarboxylates
作者:Gerrit L'abbé、Peter Van Stappen、Jean-Paul Dekerk
DOI:10.1039/c39820000784
日期:——
The electron-deficient 2H-azirine(2) reacts with enamines and α-oxo phosphorus ylides to give the pyrrole-2,3-dicardoxylates (3)–(6); α-ester phosphorus ylides on the contrary, furnish the substituted vinyliminophosporanes (7) and (8).
缺电子的2 H -azirine(2)与烯胺和α-氧代磷酰化物反应生成吡咯-2,3-二硬脂酸酯(3)–(6);相反,α-酯磷酰化物提供了取代的乙烯基亚氨基次膦酸酯(7)和(8)。
LABBE, G.;VAN, STAPPEN, P.;DEKERK, J. -P., J. CHEM. SOC. CHEM. COMMUN., 1982, N 14, 784-785