Syngenta Crop Protection, Inc.

Syngenta Participations Ag

Juerg Wiss

Fanny Giordano

Martin Zeller

Martin Charles Bowden

Gottfried Seifert

Linhua Wang

Thomas Vettiger

Dominik Faber

Thomas Aitcheson Clark

Hans-Dieter Schneider

Fanny Delphine Brigtte Giordano

A process for the preparation of a compound of formula (I), the process comprising: (i) the reaction of a compound of formula (III), with a compound of formula (IV) to give a compound of formula (II), and (ii) the reaction of the compound of formula (II) with a leaving group, to give the compound of formula (I).

Process for the synthesis of mandipropamid and derivatives thereof

A process for the production of a compound of formula (I), which comprises a) reacting a compound of formula (II), wherein Rand Rare both independently C-Calkyl, with methylhydrazine in the presence of water and a water-immiscible organic solvent being inert in saponification reactions, to form a compound of formula (III) wherein Ris as defined for formula (II) and b) saponifying that compound in situ leading to the formation of the compound of formula (I) by b1) adding a base to form the anion of the compound of formula (I) and then adding an; acid to form the compound of formula (I); or b2) adding an acid to form the compound of formula (I). 

Process for the production of pyrazoles

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Muenchwilen, Switzerland

Juerg Wiss