Aza-Henry Reaction with CF<sub>3</sub>-Ketimines: An Efficient Approach to Trifluoromethylated β-Nitroamines, 1,2-Diamines, α-Aminooximes, and Imidazolidinones
作者:Irina V. Kutovaya、Olga I. Shmatova、Viktor M. Tkachuk、Nina V. Melnichenko、Mikhail V. Vovk、Valentine G. Nenajdenko
DOI:10.1002/ejoc.201500898
日期:2015.10
and trifluoroacetophenones were studied in aza-Henryreactions with nitroalkanes. We found that nitromethane and nitropropane react with CF3-substituted ketimines to form the target β-nitroamines in high yield. The aza-Henryreaction proceeded under mild conditions in the presence of an appropriate base. A new simple method for the synthesis of β-nitroamines bearing CF3 group was developed. α-CF3-β-nitroamines
The Preparation and Reactions of<i>N</i>-Substituted Hexafluoroisopropylideneimines
作者:Nobuo Ishikawa、Tomoya Kitazume
DOI:10.1246/bcsj.46.3260
日期:1973.10
N-Aryl- and N-alkylhexafluoroisopropylideneimines (2) were prepared from the hexafluorothioacetone dimer (1) by treatment with either aryl- or alkylamines. These imines reacted with alcohols and thiols to give three addition products, 7, 8, and 9. Phenylhydrazone (3), semicarbazone (4), hydrazone (5), and azine (6) of hexafluoroacetone were also obtained directly from 1 and the corresponding carbonyl reagents.
Selective Defluorination Approach to <i>N-</i>Cbz-3,3-difluoro-2-difluoromethylenepyrrolidine and Its Application to 3,3-Difluoroproline Dipeptide Synthesis
Mg-promoted defluorination of N-(p-methoxyphenyl)bis(trifluoromethyl)imine 1 gave perfluoroenamine 2, which was readily transformed to N-Cbz-2-trifluoromethyl-3,3-difluoropyrrolidine 10. Chemoselective defluorination from the trifluoromethyl group of 10 by LHMDS-promoted dehydrofluorination in THF provided 3,3-difluoro-2-difluoromethylenepyrrolidine 11. The product 11 was converted to 3,3-difluoroproline
Reaction of polyfluorinated imines with trifluoromethyltrimethylsilane. Direct synthesis of N-(perfluoro-t-butyl)amines
作者:Viacheslav A. Petrov
DOI:10.1016/s0040-4039(00)01182-5
日期:2000.9
The reaction of N-arylimines of hexafluoroacetone and CF3Si(CH3)3 (1) in the presence of CsF results in a 48–84% yield formation of ArN(H)C(CF3)3. The reaction requires an equimolar amount of CsF and rapidly proceeds in solvents such as THF or monoglyme. Interaction of CF3NC(CF3)2 with excess of 1 leads to the formation of novel amine [(CF3)3C]2NH. Stable salt of this amine is isolated in a reaction