Reactions of polyfluoroaromatic compounds with electrophilic agents in the presence of tris(dialkylamino)phosphine
作者:V. V. Bardin
DOI:10.1007/bf02495213
日期:1997.4
The rate of replacement of the halogen atom in isomers of RC6F4X (X=Cl, Br, or I) by the SiMe3 group under the action of Me3SiCl and P(NEt2)3 depends on the nature and the mutural arrangement of the substituents X and R. In addition to silyldehalogenation, compounds C6HF4X (X=Br or I) undergo silyldeprotonation and reduction to tetrafluorobenzenes.
Nickel-Catalyzed C–H Silylation of Arenes with Vinylsilanes: Rapid and Reversible β-Si Elimination
作者:Matthew R. Elsby、Samuel A. Johnson
DOI:10.1021/jacs.7b05574
日期:2017.7.12
inability to catalyze C-H silylation; the reductive elimination step to form the silylation product is much slower than reductive elimination to form the alkene hydroarylation product. Reversible ethylene loss was not observed with 1b, which suggests that the rate-limiting step in the reaction is neither C-H activation nor β-Si elimination but either ethylene loss or reductive elimination of cis-disposed