We have disclosed a very nice advance of nickel(II)-catalyzed carboannulation reactions. Highly substituted indene derivatives are readily prepared in moderate to excellent yields under very mild reaction conditions in air via a nickel (II)-catalyzed cyclization of propargylic compounds with soft nucleophiles.
Highly Regioselective Synthesis of Benz[<i>a</i>]anthracene Derivatives via a Pd-Catalyzed Tandem C−H Activation/Biscyclization Reaction
作者:Zhi-Hui Ren、Zheng-Hui Guan、Yong-Min Liang
DOI:10.1021/jo802712n
日期:2009.4.17
A palladium-catalyzed tandem C−H activation/biscyclization reaction of propargylic carbonates with terminal alkynes was determined, which allowed the tetracyclic benz[a]anthracene framework to be constructed with high regioselectivity. A possible mechanism for this tandem C−H activation/biscyclization process was discussed.
确定了钯催化碳酸炔丙基酯与末端炔烃的串联CH活化/双环化反应,从而可以高区域选择性构建四环苯并[ a ]蒽骨架。讨论了此串联CH活化/双环化过程的可能机制。
New Insight into Ni(II)-Catalyzed Cyclization Reactions of Propargylic Compounds with Soft Nucleophiles: Novel Indenes Formation
We have disclosed a very nice advance of nickel(II)-catalyzed carboannulation reactions. Highly substituted indene derivatives are readily prepared in moderate to excellent yields under very mild reaction conditions in air via a nickel (II)-catalyzed cyclization of propargylic compounds with soft nucleophiles.