Tomas Bata University in Zlín
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Novel ring contraction of 3-hydroxy-2,4 (1H,3H) -quinolinediones in aqueous alkali. The first convenient route to 2-hydroxyindoxyls
No full textRing contraction of 3-hydroxy-2,4(1H,3H)-quinolinediones (1) in aqueous potassium hydroxide resulted in the formation of 2-hydroxyindoxyls and/or dioxindoles. The choice of N-substituent and the reaction conditions govern the chemoselectivity of the reaction. N-Phenyl-substituted derivatives 1 give 2-hydroxyindoxyls, while N-alkyl- and N-benzyl-substituted derivatives afford the corresponding dioxindols. On the basis of byproduct analysis, as well as independent experiments, the most plausible reaction mechanism is proposed
Polymerization, morphology and crystal structure of poly (p-benzamide)
No full textIsothermal polymerization of acetaminobenzoic acid at various temperatures in bulk and solution was monitored by acetic acid evolution
Factors affecting a dissipation of plasticizers during the gelatination
No full textIn this study has been watched the influence of the type of polymer and plasticizer on viscosity of PVC plastisols for coating. We have given attention to a migration of plasticizer through gelatination and after completed gelatination. It has been shown, that the type of used plasticizer and used polymer can influence the processing properties of plastisols, while type of used plasticizer has principal signification from standpoint of migration of plasticizer