Palladium-Catalyzed Trimethylenemethane Cycloaddition of Olefins Activated by the σ-Electron-Withdrawing Trifluoromethyl Group
作者:Barry M. Trost、Laurent Debien
DOI:10.1021/jacs.5b07573
日期:2015.9.16
α-Trifluoromethyl-styrenes, trifluoromethyl-enynes, and dienes undergo palladium-catalyzed trimethylenemethane cycloadditions under mild reaction conditions. The trifluoromethyl group serves as a unique σ-electron-withdrawing group for the activation of the olefin toward the cycloaddition. This method allows for the formation of exomethylene cyclopentanes bearing a quaternary center substituted by
Palladium-catalyzed cross-coupling of trifluoroisopropenylzinc reagent with vinyl halides. A novel stereospecific of trifluoromethylated 1,3-dienes
作者:Jiang Biao、Xu Yuanyao
DOI:10.1016/s0040-4039(00)93982-0
日期:1992.1
1,3-Dienes containing a CF3-group were stereospecifically synthesized via palladium-catalyzed cross-coupling of trifluoroiso-propenylzinc reagent with vinylhalides in high yields. A novel CF3-containing nucleoside, 5-(α-CF3-ethenyl)-2′-deoxyuridine (6) was prepared via this methodology.
A relaycatalytic protocol using pyrrolidine and palladium catalysis has been developed for asymmetric synthesis of 1,3-diamine derivatives from 3-substituted 1,3-dienes, sulfuric diamide, and aldehydes. This one-pot, three-component reaction features the advantages of a high atom step economy and operational simplicity, providing an efficient and straightforward access to valuable 1,3-diamines incorporating
E-(3-Trifluoromethyl-1,3-butadienyl)di-isopropoxyborane as a potentially useful CF3-containing building block: synthesis and palladium-promoted coupling with aryl halides
作者:Fuqiang Jin、Yuanyao Xu、Biao Jiang
DOI:10.1016/s0022-1139(00)80481-9
日期:1993.11
The title compound was synthesized from a trifluoroisopropenyl-zinc reagent and E-(2-bromoethenyl)di-isopropoxyborane. As a potentially useful building block for trifluoromethylated compounds, this trifluoromethyl-containing boron reagent underwent a palladium-catalyzed stereospecific coupling reaction with aryl halides to afford E-1-aryl-3-trifluoromethyl-1,3-butadienes.