Synthesis of 2-arylhydrazones of aliphatic fluorine-containing 1,2,3-tricarbonyl compounds and their reactions with dinucleophiles
作者:O. G. Kuzueva、Ya. V. Burgart、V. I. Saloutin
DOI:10.1007/bf02495977
日期:1998.4
New fluorinated 2-arylhydrazones of 1,2,3-tricarbonyl compounds were obtained by coupling fluorine-containing 3-oxo esters, 1,3-diketones, and their copper chelates with aryldiazonium chlorides. Reactions of these arylhydrazones with hydrazine hydrate, phenylhydrazine, thiosemicarbazide, and hydroxylamine gave the corresponding pyrazole and isoxazole derivatives.
Antidiabetische wirkstoffe, IV [1] trifluormethylsubstituierte 2-(4-toluidino)pyrimidine
作者:Alfred Kreutzberger、Jutta Gillessen
DOI:10.1016/s0022-1139(00)85104-0
日期:1985.9
By reaction of 4-tolylguanidine with the appropriate fluorinated β-diketones in the presence of sodium carbonate in a homogeneous phase, 4-trifluoromethyl-2-(4-toluidino)pyrimidines have become accessible as follows: the 6-methyl, 6-ethyl, 6-isopropyl-, 6-tert-butyl, and 6-isopentyl derivatives. Infrared, nuclear magnetic resonance, and mass spectroscopic data have been used to characterize the synthesized
backbone of curcuminoids. The synthesis of a series of such systems and their borondifluoride complexes is described. The electrochemical and photophysicalproperties of difluorodioxaborine species were investigated as a function of the nature of electron donor and acceptor groups appended at either terminal positions of the molecular backbone. The emissive character of these dipolar dyes was attributed
Regioselective synthesis and S-derivatization reactions of 4- and 6-trifluoromethyl-3-cyano-2(1H)-pyridinethiones
作者:Victor P. Kislyi、Kirill G. Nikishin、Elena Ya. Kruglova、Alexandr M. Shestopalov、Victor V. Semenov、Andrei A. Gakh、A.C. Buchanan
DOI:10.1016/0040-4020(96)00632-1
日期:1996.8
The regioselectivesynthesis of the title compounds was developed on the basis of condensation reactions of trifluoroacetylacetone and its methyl enacetal with cyanothioacetamide in the presence of bases. Thus, the condensation of trifluoroacetyl-acetone with cyanothioacetamide yields predominantly 4-trifluoromethyl-6-methyl-3-cyano-2(1H)-pyridinethiones, whereas the methyl enacetal of trifluoroacetylacetone
Reaction of fluoroalkyl-containing 1,3-dicarbonyl compounds with benzylideneacetone
作者:Ya. V. Burgart、A. S. Fokin、I. T. Bazyl'、V. I. Saloutin
DOI:10.1007/bf02496126
日期:1997.5
The reaction of fluoroalkyl-containing 1,3-dicarbonyl compounds with benzylideneacetone with the use of pyridine or triethylamine as a catalyst gave new 3-fluoroalkyl-4-ethoxycarbonyl(acyl)-5-phenylcyclohexan-3-ol-I-ones in yields of 16–33%.