Process and intermediate compounds for preparation of pesticidal fluoroolefin compounds

   
   

A two-step process for the preparation of fluoroolefin compounds of formula I ##STR1## wherein R is hydrogen or alkyl, and R.sup.1 is alkyl or cyclopropyl, or R and R.sup.1 are taken together with the carbon atom to which they are attached to form a cyclopropyl group; Ar is phenyl or naphthyl both of which are optionally substituted; Ar.sup.1 is phenoxyphenyl, biphenyl, phenyl, benzylphenyl, or benzoylphenyl, all of which may be optionally substituted, comprising reacting fluorobromoolefin compounds of formula II ##STR2## with organozinc compounds of formula III or IV BrZnCH.sub.2 Ar.sup.1 III Zn[CH.sub.2 Ar.sup.1].sub.2 IV in the presence of a palladium catalyst and a solvent, which compounds of formula II are obtained by reacting aldehyde compounds of formula V ##STR3## with (a) fluorotribromomethane, (b) a tri(substituted)phosphine or a hexaalkylphosphoramide or a mixture thereof, and (c) zinc, in the presence of a solvent, compounds of formula II.

Two-step процесс для подготовки смесей fluoroolefin ## ## STR1 формулы iego при котором р будет водоподом или алкилом, и R.sup.1 будет алкилово или cyclopropyl, или р и R.sup.1 приняты together with атом углерода к которому они прикреплены к форме группа cyclopropyl; Ar будет фенилово или нафтилы оба из опционно заменены; Ar.sup.1 будет phenoxyphenyl, бифенилом, фенилом, benzylphenyl, или benzoylphenyl, все из которого могут опционно быть заменены, состоя из реагирующ смеси fluorobromoolefin ## ## STR2 формулы II с смесями organozinc формулы III или IV BrZnCH.sub.2 Ar.sup.1 III Zn[CH.sub.2 Ar.sup.1].sub.2 IV in the presence of катализатор палладиума и растворитель, который смесям формулы II получают путем реагировать смеси альдегида ## ## STR3 формулы v с (a) fluorotribromomethane, (b) tri(substituted)phosphine или hexaalkylphosphoramide или смесь thereof, и (c) цинк, in the presence of растворитель, смеси формулы II.

 
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