Hydrolysis of fluoroalkyl-containing ?-aminovinyl ketones
摘要:
The kinetics of hydrolysis of fluoroalkyl-containing beta-aminovinyl ketones R1C(O)CHC(NHR3)R2, in which the substituents CF3 and HCF2CF2 are in the ketone (R1) or enamine parts of the molecule (R2), was studied. In acid (pH < 5) and alkaline (pH > 10) media, they hydrolyze with the formation of the corresponding amines and beta-diketones. In an alkaline medium, the beta-diketones undergo cleavage to fluorinated acids and methyl ketones. The rate constants of hydrolysis in an acid medium change within a range of four orders, depending on the nature of the substituents. The presence of a fluoroalkyl group at the enamine reaction center increases the hydrolysis rate. In an alkaline medium, the rate constants vary within one order.
Condensation of fluorinated 3-oxo esters or 1,3-diketones with benzaldehyde and (thio)urea results in the diastereoselective formation of 4-fluoroalkyl-4-hydroxy-2-oxo(thioxo)-6-phenyl-hexahydropyrimidine-5-carboxylates from which by dehydration under acidic conditions the corresponding 6-fluoroalkyl-2-oxo(thioxo)-4-phenyl-1,2,3,4-tetrahydropyrimidine-5-carboxylates were obtained. Under the same conditions
New fluorinated 2-arylhydrazones of 1,2,3-triketones, 2-arylhydrazone-1,2,3-diketo esters and 3-arylhydrazone-1,2,3,4-triketo esters have been prepared by the coupling of fluorine-containing 1,3-keto esters, 1,3-diketones, acyl(aroyl)pyruvic esters and their chelates with aryldiazonium chlorides. The arylhydrazones react with hydrazine hydrate, phenylhydrazine, thiosemicarbazide and hydroxylamine to
Condensation of fluoroalkyl-containing 1,3-dicarbonyl compounds with ethylenediamine
作者:V.I. Saloutin、Z.E. Skryabina、Y.V. Burgart
DOI:10.1016/s0022-1139(00)81181-1
日期:1992.3
interaction of fluoroalkylated 1,3-diketones with ethylenediamine hydroperchlorate; similarly, 1,2,3,4-tetrahydro-1,4-diazepine-5-ones have been obtained from fluorinated 1,3-keto esters. Under mild conditions, fluorinated copper(II) 1,3-diketonates, and copper(II) and nickel(II) N,N′-ethylenebis(aminovinyl ketonates) were found to react with ethylenediamine to form fluoroalkyl-containing N,N′-ethylenebis(aminovinyl
通过氟烷基化的1,3-二酮与乙二胺氢氯酸盐的直接相互作用制备了2,3-二氢-1 H -1,4-二氮杂pine;类似地,已经从氟化的1,3-酮酯获得了1,2,3,4-四氢-1,4-二氮杂-5-酮。在温和的条件下,发现氟化的1,3-二酮铜(II)和N(N)的铜(II)和N'-亚乙基双(氨基乙烯基酮)会与乙二胺反应生成含氟烷基的N,N' -亚乙基双(氨基乙烯基酮)和/或2,3-二氢-1 H -1,4-二氮杂s 。
Pashkevich; Khomutov; Sevenard, Russian Journal of Organic Chemistry, 2000, vol. 36, # 8, p. 1144 - 1149
作者:Pashkevich、Khomutov、Sevenard
DOI:——
日期:——
Photophysical studies on ternary mixed ligand europium complexes containing pyridyltriazolylmethane and 1,3-diketonate ligands
作者:Alexey N. Gusev、Miki Hasegawa、Victor F. Shul’gin、Galyna Nishchymenko、Wolfgang Linert
DOI:10.1016/j.ica.2014.01.050
日期:2014.4
1,1-Bis[5-(pyridine-2-yl)-1,2,4-triazol-3-yl]methane have been used to prepare ternary lanthanide complexes in which the remaining ligands are different diketonate-anions. The complexes were characterized by various measurements including single-crystal X-ray crystallography. The characteristic photophysical properties of these complexes, i. e. the absorption and luminescence spectra, the metal-centred lifetimes and the overall luminescence yields were measured. All title complexes show strong sharp red emissions in the solid state, corresponding to D-5(0) -> F-7(J) (J = 0-3) transitions with D-5(0) -> F-7(2) (612-621 nm) as the most prominent one. Three-layer light-emitting diodes based on PVK doped with the title complexes as active layer were fabricated and examined. (C) 2014 Elsevier B. V. All rights reserved.