Multisubstituted N-fused heterocycles via transition metal-catalyzed cycloisomerization protocols
作者:Ilya V. Seregin、Alex W. Schammel、Vladimir Gevorgyan
DOI:10.1016/j.tet.2008.04.023
日期:2008.7
multisubstituted N-fused heterocycles have been developed. It was demonstrated that 1,3-disubstituted N-fused heterocycles, including indolizines, pyrroloquinoxalines, and pyrrolothiazoles can easily be synthesized via an exceptionally mild and efficient method involving a novel silver-catalyzed cycloizomerization of propargyl-containing heterocycles. Alternatively, 1,2-disubstitutedheterocycles can be accessed
Desulfitative palladium-catalyzed direct C-3 arylation of indolizines with arylsulfonyl chlorides
作者:Wei Zhang、Fang Liu、Baoli Zhao
DOI:10.1002/aoc.3326
日期:2015.8
Pd‐catalyzed desulfitative approach to C‐3 arylation of indolizine derivatives has been developed, and the protocol uses readily available arylsulfonylchlorides as the arylation reagent under nitrogen. This transformation was performed in a mixed solvent of 1‐methyl‐2‐pyrrolidone and dimethoxyethane using simple triphenylphosphine as a ligand, which provides a new method for the C‐3 arylation of indolizines
Intramolecular CN Bond Formation under Metal-free Conditions: Synthesis of Indolizines
作者:Junliang Wu、Wei Lin Leng、Hongze Liao、Kim Le Mai Hoang、Xue-Wei Liu
DOI:10.1002/asia.201403400
日期:2015.4
Polysubstituted indolizine derivatives are constructed via intramolecularCNbondformation/CH bond cleavage under metal‐free conditions. These methods offer straightforward pathways to transform pyridyl chalcones into a variety of indolizines.
多取代的中氮茚衍生物经由分子内Ç构造 N键形成/ C 不含金属的条件下,H键裂解。这些方法提供了将吡啶基查耳酮转化为多种吲哚嗪的直接途径。
Base- and Ligand-free Room-Temperature Synthesis of N-Fused Heteroaromatic Compounds via the Transition Metal-Catalyzed Cycloisomerization Protocol
作者:Ilya V. Seregin、Alex W. Schammel、Vladimir Gevorgyan
DOI:10.1021/ol701464j
日期:2007.8.1
A new practical method for the synthesis of N-fused heterocycles via the transition metal-catalyzed cycloisomerization of heterocyles possessing a propagyl group has been developed. This very mild, base- and ligand-free method allows for the synthesis of diverse fused heterocyclic cores in good to excellent yields.
Highly Efficient Synthesis of Functionalized Indolizines and Indolizinones by Copper-Catalyzed Cycloisomerizations of Propargylic Pyridines
作者:Bin Yan、Yebing Zhou、Hao Zhang、Jingjin Chen、Yuanhong Liu
DOI:10.1021/jo070983j
日期:2007.9.1
[GRAPHICS]The copper-catalyzed cycloisomerizations of 2-pyridyl-substituted propargylic acetates and its derivatives are described, which offer an efficient route to C-1 oxygenated indolizines with a wide range of substituents under mild reaction conditions. The presented method could be readily applied to the synthesis of indolizinones through a cyclization/1,2-migration of tertiary propargylic alcohols.