Preparation of novel fungicidally active spiro derivatives of 3-(3,5-dihalogenophenyl)-oxazolidine-2-thion-4-ones

Abstract

Fungicidally active novel spiro derivatives of 3-(3,5-dihalogenophenyl)-oxazolidine-2-thion-4-ones of the formula ##STR1## in which X and Y each independently is halogen, and n is 2 or 3, are produced by reacting an .alpha.-hydroxy-cycloalkylcarboxylic acid or acid ester of the formula ##STR2## in which R is hydrogen or alkyl with 1 to 4 carbon atoms, (a) with an isothiocyanate of the formula ##STR3## or (b) with an aniline of the formula ##STR4## in the presence of a diluent, and then cyclizing the .alpha.-hydroxycycloalkyl-carboxylic acid amide formed of the formula ##STR5##

Dependencies are inferred from the claim text.