Nitrogen-containing heterocycles from metal β-diketonates
摘要:
Factors determining the reaction of metal beta-diketonates with hydrazine, in particular the nature of central metal ion and structure of beta-diketonate ligand, are discussed. The possibility for the preparation of other heterocyclic compounds via reaction of metal acetylacetonates with phenylhydrazine, o-phenylenediamine, urea, and thiourea was studied.
3-R-Thio- and 3-R-Oxy-substituted metal acetylacetonates
摘要:
New S- and O-substituted metal acetylacetonates were prepared from phenylthio-, butylthio-, benzenesulfonato-, and 3-acetoxyacetylacetone and appropriate metal salts. The spectral characteristics of the compounds were obtained. The effect of the alpha-substituent on the stability of the chelates under the conditions of chromatographic separation on silica gel was revealed. The reactivity of the acetate group bonded to the chelate ring is decreased, which does not allow preparation of new substituted complexes by common transformations of esters.