《Utilizing Vinylcyclopropane Reactivity: Palladium-Catalyzed Asymmetric [5+2] Dipolar Cycloadditions》 was written by Li, Miao-Miao; Xiong, Qin; Qu, Bao-Le; Xiao, Yu-Qing; Lan, Yu; Lu, Liang-Qiu; Xiao, Wen-Jing. Quality Control of Tris(dibenzylideneacetone)dipalladium(0) And the article was included in Angewandte Chemie, International Edition in 2020. The article conveys some information:
Vinylcyclopropanes (VCPs) are commonly used in transition-metal-catalyzed cycloadditions, and the utilization of their recently realized reactivities to construct new cyclic architectures is of great significance in modern synthetic chem. Herein, a palladium-catalyzed, visible-light-driven, asym. [5+2] cycloaddition of VCPs with α-diazoketones is accomplished by switching the reactivity of the Pd-containing dipolar intermediate from an all-carbon 1,3-dipole to an oxo-1,5-dipole. Enantioenriched seven-membered lactones were produced with good reaction efficiencies and selectivities (23 examples, 52-92% yields with up to 99:1 er and 12.5:1 dr) [e.g., I + II → III (87%, 96:4 er, 4:1 dr)]. In addition, computational investigations were performed to rationalize the observed high chemo- and periselectivities. In the part of experimental materials, we found many familiar compounds, such as Tris(dibenzylideneacetone)dipalladium(0)(cas: 51364-51-3Quality Control of Tris(dibenzylideneacetone)dipalladium(0))
Tris(dibenzylideneacetone)dipalladium(0)(cas: 51364-51-3) is used in the preparation of semiconducting polymers processed from nonchlorinated solvents into high performance thin film transistors.Quality Control of Tris(dibenzylideneacetone)dipalladium(0)It is used as catalyst for the synthesis of epoxides, alpha-arylation of ketones, in combination with BINAP for the asymmetric heck arylation of olefins, site-selective benzylic sp3 palladium-catalyzed direct arylation and homoallylic diamination of terminal olefins.
Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI