Copper-Catalyzed Oxidative Cyclization of 1,5-Enynes with Concomitant C–C Bond Cleavage: An Unexpected Access to 3-Formyl-1-indenone Derivatives
摘要:
A Cu(0)/Selectfluor system-mediated oxidative cyclization of 1,5-enynes with concomitant C-C bond cleavage to access 3-formyl-1-indenone derivatives is described. Preliminary mechanistic investigations disclosed that the C-C bond cleavage involved a novel water-participated oxygen-insertion beta-carbon elimination through double oxy-cuprations.
Palladium-Catalyzed Selective Synthesis of Naphthalenes and Indenones and Their Luminescent Properties
作者:Xiaopeng Chen、Jisong Jin、Ningning Wang、Ping Lu、Yanguang Wang
DOI:10.1002/ejoc.201101506
日期:2012.2
Selectivesynthesis of functionalized naphthalenes and indenones by palladium-catalyzed cyclization of o-haloacetophenones and terminal alkynes in the presence of a secondary amine is reported. Under a nitrogen atmosphere, the palladium-catalyzed reaction of o-haloacetophenones with terminal alkynes in the presence of wet secondary aminesgenerated 1-(dialkylamino)-3-aryl/alkylnaphthalenes. When the
A Cu(0)/Selectfluor system-mediated oxidative cyclization of 1,5-enynes with concomitant C-C bond cleavage to access 3-formyl-1-indenone derivatives is described. Preliminary mechanistic investigations disclosed that the C-C bond cleavage involved a novel water-participated oxygen-insertion beta-carbon elimination through double oxy-cuprations.