A pesticidal compound of formula I: ##STR1## in which formula: either R.sup.1 is hydrogen and R.sup.2 represents a cyclopropyl group or R.sup.1 and R.sup.2 each represent an alkyl group, which alkyl groups may be the same or different; Ar.sub.A represents an optionally substituted phenyl or naphthyl group; Ar.sub.B represents a phenoxy, phenyl, benzyl or benzoyl-substituted phenyl group which is optionally further substituted; the configuration of the groups Ar.sub.A --CR.sup.1 R.sup.2 and --CH.sub.2 Ar.sub.B about the double bond being mutually trans. Preferably Ar.sub.A is a substituted phenyl group; more preferably being substituted at the 4-(para) position by halogen, alkoxy or haloalkyl. Further provided is a process for the preparation of a pesticidal compound of formula I in which a compound comprising a moiety ##STR2## and a compound comprising a moiety Ar.sub.B -- are reacted together forming a link --CH.dbd.C(F)CH.sub.2 -- between ##STR3## and Ar.sub.B in the compound of formula I.
(EN) A pesticidal compound of formula (I) in which R1 is hydrogen and R2 represents a cyclopropyl group or R1 and R2 each represents an alkyl group, which alkyl groups may be the same or different; ArA represents an optionally substituted phenyl or naphthyl group; ArB represents a phenoxy, phenyl, benzyl or benzoyl-substituted phenyl groups which is optionally further substituted; the configuration of the groups ArA-CR1R2 and -CH2ArB about the double bond being mutually trans. Preferably ArA is a substituted phenyl group; more preferably being substituted at the 4-(para) position by halogen, alkoxy or haloalkyl. Further provided is a process for the preparation of a pesticidal compound of formula (I) in which a compound comprising a moiety (a) and a compound comprising the moiety ArB- are reacted together forming a link -CH=C(F)CH2- between (a) and Arb in the compound of formula (I).(FR) Un composé pesticide correspond à la formule (I) dans laquelle R1 représente hydrogène, et R2 un groupe cyclopropyle, soit ils représentent chacun un groupe alkyle, les groupes étant identiques ou différents; ArA représente un groupe phényle ou naphtyle éventuellement substitué; ArB représente un groupe phényle éventuellement substitué par phénoxy, phényle, benzyle ou benzoyle; la configuration des groupes ArA-CR1R2 et -CH2ARB autour de la double liaison étant mutuellement trans. ArA représente de préférence un groupe phényle substitué, surtout s'il est substitué en position 4-(para) par halogène, alcoxy ou haloalkyle. L'invention concerne également un procédé de préparation d'un composé pesticide correspondant à la formule (I) dans lequel un composé comprenant la fraction (a) et un composé comprenant une fraction Arb réagissent ensemble pour former une liaison -CH=C(F)CH2- entre (a) et ArB dans le composé de formule (I).
The pyrethrins and related compounds. Part XLII:Structure-activity relationships in fluoro-olefin non-ester pyrethroids
作者:Bhupinder P S Khambay、Andrew W Farnham、Mu-Guang Liu