Rhodium-Catalyzed Synthesis of Isoquinolines and Indenes from Benzylidenehydrazones and Internal Alkynes
作者:Xiao-Cheng Huang、Xu-Heng Yang、Ren-Jie Song、Jin-Heng Li
DOI:10.1021/jo402497v
日期:2014.2.7
presented for the selective assembly of isoquinolines and indenes by rhodium-catalyzed tandem cyclization of benzylidenehydrazones with internal alkynes. This method involves the selective cleavage of the N–N bond and the C═N bonds and is dependent on the substituents of the benzylidenehydrazone.
A highly efficient and practical synthesis of benzofulvenes was developed via ketone-directed Cp*Co(III)-catalyzed sequential C–H activation, addition, cyclization, and dehydration cascade processes between simple aromaticketones and alkynes. The reaction tolerates a variety of functional groups, and various benzofulvenes were efficiently synthesized in 42–92% yields.
Diverse Strategies toward Indenol and Fulvene Derivatives: Rh-Catalyzed C−H Activation of Aryl Ketones Followed by Coupling with Internal Alkynes
作者:Frederic W. Patureau、Tatiana Besset、Nadine Kuhl、Frank Glorius
DOI:10.1021/ja110650m
日期:2011.2.23
The synthesis of indenols and fulvenes was achieved through Rh-catalyzed C-H bond activation of simple and diverse arylketone derivatives and subsequent coupling with internal alkynes. The process was found to involve either an α or γ dehydration step, depending on the substrate disposition and representing diverse pathways toward functionalized fulvenes.