Politechnika Warszawska

Anna Jerzak

Ludwik Synoradzki

Roman Zadrozny

Agnieszka Krolikowska

Krzysztof Bujnowski

Jacek Bordzilowski

Krzysztof Dzienis

Jerzy Wisialski

Marcin Koziorowski

Agnieszka KRÓLIKOWSKA

Method for preparation of 5-alkylsalicylaldoximes with formula 1, where R is a C6-C16 alkyl group, consisting in that into a water-alcohol solvent system, p-alkylphenol, sodium hydroxide, chloroform and hydroxylamine are introduced, while in relation to the alkylphenol used, sodium hydroxide and chloroform are used in amounts from the stoichiometric amount to a 100% excess, and hydroxylamine is used in amounts from the stoichiometric amount to a 60% excess, and the reaction is carried out at a temperature of 60-75&#xb0; C. for 1.5-4 h, and then, at a temperature of 20-30&#xb0; C., the post-reaction mixture is acidified till the pH of the aqueous phase &#x3c;7.0 is obtained, and next, an alcohol-water azeotrope is distilled off with an admixture of unreacted chloroform, the residue is mixed with a neutral C5-C10 hydrocarbon solvent, the layers are separated, and the solvent is distilled off from the organic phase.

Method for preparation of 5-alkylsalicylaldoximes and application thereof

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Warsaw, Poland

Anna Jerzak