Syngenta Crop Protection, Inc.

Syngenta Participations Ag

Devender Singh Negi

David Anthony Jackson

Florian Schleth

Werner Pfaff

The present invention relates to a continuous process for producing a haloalkenone ether of the Formula (I) wherein Ris C-Chaloalkyl, Ris a C-Calkyl or phenyl, the process comprising:&#x2014;(i) reacting, in a first continuous stirred tank reactor comprising a solvent, a halide of Formula (II) wherein Ris as previously defined and Ris halogen, with a vinyl ether of Formula (III) wherein Ris as previously defined, to form an intermediate compound of Formula (IV), wherein the concentration of the vinyl ether of Formula (III) in the reaction mass is 15% or less w/w; and (ii) transferring the reaction mass from the first continuous stirred tank reactor into a subsequent continuous stirred tank reactor, wherein the conditions within the subsequent reactor permit the elimination of hydrogen halide (HR) from the intermediate compound of Formula (IV) to provide the haloalkenone ether of Formula (I). 

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Muenchwilen, Switzerland

Devender Singh Negi