ORTHOAMIDES, XLVIII REACTIONS OF AN AZAVINYLOGUE AMINALESTER WITH CH2-ACIDIC COMPOUNDS
Condensation reactions of azavinylogue orthoamides 5a and 6a with CH2-acidic compounds are described.Reaction products are formylated - or azavinylogue formylated compounds 8 and 9 resp.The condensation reactions of 5a can be enhanced by addition of trimethyl borate.Under these conditions the formylations reaction-leading to compounds of type 8 - is preferred.
Kantlehner, Willi,Hauber, Michael
p. 697 - 704
(2007/10/02)
Chromoionophores, VI. New Chromoionophores with Azulene Units and High Color Selectivity for Ba2+ Ions
The neutral ligand 2b in solution (acetonitrile) shows a color change from yellowish-orange to blueish-violet on addition of barium salts.Relatively little alterations of color from orange up to red are effected by other alkali and alkaline earth metal salts.The syntheses, spectroscopic investigations, and cation selectivities of the new 6-aminoazulene coronands 2a,b and 3 are described.The band shifts in the absorption spectra are discussed in view of dipole moment changes of the azulene system proceeding from the ground- to the photoexcited state.
Loehr, Hans-Gerd,Voegtle, Fritz
p. 905 - 913
(2007/10/02)
IMPROVED SYNTHESIS OF 1,5-BIS(DIMETHYLAMINO)-1,4-PENTADIEN-3-ONE
1,5-Bis(dimethylamino)-1,4-pentadien-3-one is conveniently prepared in quantitative yield by reaction of 1,3-acetonedicarboxylic acid with dimethylformamide dimethylacetal.
Taylor, Edward C.,Skotnicki, Jerauld S.
p. 1137 - 1138
(2007/10/02)
Reactions of enaminoketones with CH-acidic compounds (author's transl)
-
Eiden,Herdeis
p. 287 - 293
(2007/10/05)
More Articles about upstream products of 25299-40-5