Rhone-poulenc Sante

Rhone-poulenc Agro

Bayer Cropscience S.a.

Albert Buforn

Michel Mulhauser

Viviane Massonneau

Alain Gadras

Bernadette Mandard-Cazin

Jean-Fran&ccedil;ois Rousseau

Processes for the preparation of pesticidal compounds and novel intermediates thereof

Novel 2-thiothiazolidin-5-one compounds useful as intermediates for fungicidal 2-imidazolin-5-ones are disclosed.

Intermediates for the preparation of 2-imidazolin-5-ones

Novel 2-thio-thiazolidine-5-one compounds useful as intermediates for fungicidal 2-imidazoline-5-ones are disclosed.

Intermediates for the preparation of 2-imidazoline-5-ones

Hydroxyalkylating agents of formula: ##STR1## in which R denotes alkyl, n is 2 or 3, R.sub.1 denotes hydrogen or alkyl and R.sub.2 denotes alkyl an unsubstituted or substituted phenyl or ##STR2## are useful inter alia for the preparation of 1-(hydroxyalkyl)imidazoles. They are made by reaction of a sulphonic acid or dimethyl sulphate with a corresponding decarboxylate ester.

Process for preparing hydroxyalkylating agents, the agents so obtained,

Process for preparing 1-(hydroxyalkyl)nitroimidazoles of formula: ##STR1## which comprises reacting a sulphite or diacetate of an alkylenediol of formula:

Process for preparing 1-hydroxyalkyl-2-methyl-5-nitroimidazoles

Process for preparing 1-hydroxyalkyl-5-nitroimidazole

Process for preparing 1-(hydroxyalkyl)nitroimidazoles of formula: ##STR1## which comprises reacting an alkylene sulphate of formula: ##STR2## with an imidazole derivative of formula: ##STR3## followed by hydrolyzing or alcoholyzing the product obtained. In the formulae (I) and (II), n is 2 or 3; in the formulae (I) and (III), R denotes hydrogen or hydrocarbon radical; and in the formula (III), X denotes hydrogen or a radical that can be removed by hydrolysis or alcoholysis.

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Lyons, France

Albert Buforn