A Convenient Preparation of 1,3-Dithiole-2-thione and 1,3-Diselenole-2-selone Derivatives
作者:K. Takimiya、A. Morikami、T. Otsubo
DOI:10.1055/s-1997-787
日期:1997.3
A convenient one-pot preparation of 1,3-dithiole-2-thiones and 1,3-diselenole-2-selones substituted with phenyl, alkyl, alkylthio, hydroxymethyl, and formyl groups was accomplished from readily available acetylenes in good to excellent yields.
A TTF-linked porphyrin dyad and its zinc complex have been synthesized as novel photosystems with a redox-active pendant. The two chromophores of these dyads are not interactive in the absorption spectra, but the fluorescence of the porphyrin chromophore is dramatically quenched by intramolecularelectrontransfer from the TTF pendant.
An expedient stereoselective access to (Z)-2-fluoroalkenoates
作者:Denis Clemenceau、Jack Cousseau
DOI:10.1016/s0040-4039(00)91826-4
日期:1993.10
The reaction between an aldehyde R-CHO and diethyl 2-oxo-3-fluorobutan-1,4-dioate as its sodium salt EtO2C-CO-CF-CO2Et-, Na+ mainly leads in THF to (Z)-2-fluoroalkenoates R-CH=CF-CO2Et (Z/E greater-than-or-equal-to 80/20), the Z-stereoselectivity depending on the bulk of the R group.
Nozdryn, Tomasz; Cousseau, Jack; Gorgues, Alain, Journal of the Chemical Society. Perkin transactions I, 1993, # 15, p. 1711 - 1712