polysubstituted quinolinesfrom o-vinyl anilines and aldehydes. The reaction proceeds in a cascade manner through condensation, electrocyclization and dehydrogenation, and gives access to a wide range of quinolines with alkyl and/or aryl substituents as demonstrated with 40 examples. The metal-free catalytic procedure allows a heterogeneous protocol for the synthesis of various polysubstituted quinolines. The
Silver-Catalyzed Three-Component Approach to Quinolines Starting from Anilines, Aldehydes, and Alcohols
作者:Xu Zhang、Zhiqiang Wang、Wenmin Liu、Ruixue Sun、Xuefeng Xu、Yanlei Yan
DOI:10.1055/s-0035-1561916
日期:——
A silver-catalyzed sequential formation of two C–C bonds for the construction of a series of polysubstituted quinolines from anilines, aldehydes, and alcohols under mild conditions has been developed. The transformation is effective for a broad range of substrates, including aliphatic alcohols, arylalkanols, cycloalkanols, and ethylene glycol, thereby permitting the expansion of the constituent architectures
A Mn(III)‐mediatedradicalcyclization reaction of o‐vinylaryl isocyanides and arylboronic acids or diphenylphosphine oxides to access various 2‐functionalized quinolines under mild conditions was developed. With the introduction of radical stabilizing substituents (e. g. aryl and methyl group) on vinyl group, this reaction provides a regiospecific 6‐endo‐trig radicalcyclization of o‐vinylaryl isocyanides
A palladium‐catalyzed [5+1] annulation of 2‐(1‐arylvinyl) anilines and α‐diazocarbonyl compounds has been developed, affording a series of multi‐functionalized quinolines in moderate to good yields. This procedure proceeded with the sequential insertion of N−H bond to the palladium carbene, intramolecular Heck reaction and decarboxylation steps. In this reaction, alkyl 2‐diazophenylacetates served