Difluorinated malonaldehyde derivatives as useful difluoromethylene-containing building blocks
作者:Takashi Tsukamoto、Tomouya Kitazume
DOI:10.1039/c39920000540
日期:——
New CF2-containing building blocks, ethyl 3-ethoxy-2,2-difluoro-3-hydroxy-propionate and -propioamide, were prepared via formylation of α,α-difluorinated Reformatsky reagents, and reacted with active methylene compounds, nitromethane or phosphonoacetate to afford α,α-difluoro-functionalized esters and amides.
Lewis Acid-Promoted Reaction of β,β-Difluorinated<i>N</i>,<i>O</i>-Acetal with Silylated Nucleophiles
作者:Takashi Tsukamoto、Tomoya Kitazume
DOI:10.1246/cl.1992.1377
日期:1992.7
Lewis acid-promoted reaction of ethyl 3-ethoxy-2,2-difluoro-3-(dimethylamino)propionate (1) with some silylated nucleophiles afforded β,β-difluoroamines in good yields. The formation of iminium ion intermediate from 1 and BF3·OEt2 was confirmed by 19F and 13C NMR spectroscopy.
Tsukamoto, Takashi; Kitazume, Tomoya, Journal of the Chemical Society. Perkin transactions I, 1993, # 10, p. 1177 - 1182
作者:Tsukamoto, Takashi、Kitazume, Tomoya
DOI:——
日期:——
Synthese Simple des Analogues Fluores, Phosphones ou Sulfones de L'Acide Aspartique
作者:Laurent Bijeire、Colette Denier、Michel Mulliez、Waldir Tavares De Lima
DOI:10.1080/10426500601087418
日期:2007.2.15
Two stable hemiaminals, N acylated by the p-nitrobenzoyl or Boc group and each substituted by the difluorocarboxylethylester moiety, were obtained in a single step from the corresponding ethylhemiacetal. The Boc compound, after acylation by trifluoroacetic anhydride followed by in situ reaction either with trimethylsilylated derivatives of cyanide or diethylphosphite, or with sodium sulfite, led to