Radical Amido‐ and Azido‐Fluorination of
α
‐Fluorostyrene Derivatives: An Innovative Approach Towards
β
‐Aryl‐
β
,
β
‐difluoroamino Motifs
摘要:
AbstractAn innovative one‐step synthesis towards β‐aryl‐β,β‐difluorocarbamates and β‐aryl‐β,β‐difluoroazides is presented. The described approach relies on the use of α‐fluorostyrene substrates in a radical addition/fluorination reaction with N‐centered radicals in the presence of Selectfluor®. The best results were obtained for the azidofluorination reaction. The resultant β‐aryl‐β,β‐difluoroazides were further transformed into Nitrogen‐based heterocycles (e. g. pyrrole, triazole, and tetrazole) and in more elaborated azide derivatives.
Transition Metal Catalyzed Cross-Coupling Of 1-Halo-1-Haloalkene Compounds
申请人:Guiles Joseph W.
公开号:US20080194842A1
公开(公告)日:2008-08-14
Methods for introducing a 1-halo-1-haloalkene compound onto an aromatic or heteroaromatic ring are provided, including processes for the production of certain 1-halovinyl aryl or heteroaryl derivatives in which the 1-halovinyl group is either 1-fluoro or 1-chlorovinyl and the aromatic species phenyl or thiophene, the processes including coupling an arylmagnesium species with a dihalo olefin in the presence of a nickel or iron catalyst.
Transition metal catalyzed cross-coupling of 1-halo-1-haloalkene compounds
申请人:Guiles Joseph W.
公开号:US20090054667A1
公开(公告)日:2009-02-26
Methods for introducing a 1-halo-1-haloalkene compound onto an aromatic or heteroaromatic ring are provided, including processes for the production of certain 1-halovinyl aryl or heteroaryl derivatives in which the 1-halovinyl group is either 1-fluoro or 1-chlorovinyl and the aromatic species phenyl or thiophene, the processes including coupling an arylmagnesium species with a dihalo olefin in the presence of a nickel or iron catalyst.
Grignard Cross-Coupling Amenable to Large Scale Production of α-Fluorostyryl and α-Fluorovinylthiophenes
作者:Jian Qiu、Albert Gyorokos、Theodore M. Tarasow、Joseph Guiles
DOI:10.1021/jo801647x
日期:2008.12.19
GraphicsAn efficient nickel-catalyzed Kumada-Corriu cross coupling enabled the introduction of an alpha-fluorovinyl functionality with excellent conversion and specificity.
[EN] TRANSITION METAL CATALYZED CROSS-COUPLING OF 1-HALO-1-HALOALKENE COMPOUNDS<br/>[FR] COUPLAGE CROISE CATALYSE DE METAUX DE TRANSITION DE COMPOSES 1-HALO-1-HALOALKENE
申请人:REPLIDYNE INC
公开号:WO2007021693A3
公开(公告)日:2007-12-13
Stereodivergent Alkyne Hydrofluorination Using Protic Tetrafluoroborates as Tunable Reagents
作者:Rui Guo、Xiaotian Qi、Hengye Xiang、Paul Geaneotes、Ruihan Wang、Peng Liu、Yi‐Ming Wang
DOI:10.1002/anie.202006278
日期:2020.9.14
available precursors remains a synthetic challenge. The metal‐free hydrofluorination of alkynes constitutes an attractive though elusive strategy for their preparation. Introduced here is an inexpensive and easily handled reagent that enables the development of simple and scalable protocols for the regioselective hydrofluorination of alkynes to access both the E and Z isomers of vinyl fluorides. These