Hydrogen-Bonding-Assisted α-F Elimination from Cu–CF<sub>3</sub> for in Situ Generation of R<sub>3</sub>N·HF Reagents: Reaction Design and Applications
作者:Song-Lin Zhang、Jia-Jia Dong
DOI:10.1021/acs.orglett.9b02516
日期:2019.9.6
isted α-F elimination from Cu-CF3 compounds that generates R3N·HF reagents in situ. Combining this strategy and Cu(III)-CF3 chemistry with alkynes, dual fluorination and trifluoromethylation of terminal alkynes is enabled by a single Cu(III)-CF3 compound assisted by a tertiary amine with excellent regio- and stereoselectivity. This strategy also enables the development of other reaction types involving
<i>syn</i>-Fluoro- and -Oxy-trifluoromethylation of Arylacetylenes
作者:Song-Lin Zhang、Hai-Xing Wan、Wen-Feng Bie
DOI:10.1021/acs.orglett.7b03229
日期:2017.12.1
One-step concurrent fluoro-trifluoromethylation across the triple bond of arylacetylenes in a syn mode is enabled by the collaboration of (phen)CuIII(CF3)3 and CsF that produces chemo-, regio-, and stereoselectively (Z)-α-fluoro-β-CF3 styrenes. This method can be extended to achieve syn-oxy-trifluoromethylation and syn-aryl-trifluoromethylation of alkynes using phenoxides, alkoxides, or phenylboronic
Nucleophilic reactions of fluoroolefins. VI. Reactions of 1-phenylpentafluoropropene with lithium aluminium hydride. Regio- and stereoselective substitution of vinylic fluorines by hydrogen
作者:Wojciech Dmowski
DOI:10.1016/s0022-1139(00)82327-1
日期:1985.9
1-Phenylpentafluoropropene reacted readily with lithiumaluminiumhydride in glyme to give products of the displacement of vinylic fluorine atoms by hydrogen. In the temperature range between −20°C and −10°C, the substitution of one vinylic fluorine occurred, either at carbon C-1 or C-2, to give predominantly monohydrofluoroalkenes and while at 20° . 97% conversion to 1,2-dihydrofluoroalkenes took