activation of fluorinatedalkenes and arenes was developed. In this Pd-catalyzed Suzuki–Miyaura-type cross-coupling reaction, neither a base for enhancing the reactivity of the organoboron reagents nor a Lewis acid for promoting C–F bond activation was required. A fluoropalladium intermediate played an essential role in this reaction. In addition, a Ni(NHC) catalyst was efficient for C–C coupling through
Synthesis of Trifluorostyrene Derivatives by Palladium-Catalyzed Cross-Coupling of Lithium Trimethoxy(trifluorovinyl)borate with Aryl Bromides
作者:Sasa Duric、Bernd M. Schmidt、Nina M. Ninnemann、Dieter Lentz、C. Christoph Tzschucke
DOI:10.1002/chem.201103067
日期:2012.1.9
Fluor‐ing it: The stable, crystalline trimethoxy(trifluorovinyl)borate is a convenient reagent for efficiently displacing a bromineatom with a trifluorovinyl group (see scheme). This Suzuki coupling reaction significantly simplifies the route to trifluorostyrenes, which might be interesting compounds for materials science or medicinal chemistry.
PREPARATION METHOD FOR FLUORINE-CONTAINING OLEFINS HAVING ORGANIC-GROUP SUBSTITUENTS
申请人:Nagai Takabumi
公开号:US20130324757A1
公开(公告)日:2013-12-05
An object of the present invention is to provide a method that enables the easy and efficient (high yield, high selectivity, low cost) preparation of a fluorine-containing olefin substituted with an organic group or groups from a fluorine-containing olefin.
[Solution] The method for preparing a fluorine-containing olefin substituted with an organic group or groups, the method comprising a step of reacting a fluorine-containing olefin with an organic boron compound in the presence of an organic transition metal catalyst containing at least one transition metal selected from the group consisting of nickel, palladium, platinum, rhodium, ruthenium, and cobalt.
We developed the copper-mediated synthesis of trifluorostyrene derivatives. β-Fluorine elimination of a 2-aryl-1,1,2,2-tetrafluoroethylcopper complex, generated in situ from arylboronate, copper tert-butoxide, and 1,10-phenanthroline with tetrafluoroethylene (TFE) via carbocupration, was promoted by the addition of a Lewis acid. The present reaction system was applied to the one-pot synthesis of various trifluorostyrene derivatives, through the transmetalation–carbocupration–β-fluorine elimination sequence.
Pd-Catalyzed Arylation of Chlorotrifluoroethylene Using Arylboronic Acids
作者:Tetsuya Yamamoto、Tetsu Yamakawa
DOI:10.1021/ol3014107
日期:2012.7.6
The palladium-catalyzed cross-coupling of chlorotrifluoroethylene and arylboronic acids proceeds in the presence of a base and H2O to provide alpha,beta,beta-trifluorostyrene derivatives in satisfactory yields.