A phenoxypyridine derivative having the formula (CH.sub.3 COO).sub.n CH.sub.3-n R (I) wherein R represents ##STR1## and n is 1 or 2 is produced by reacting a phenoxypyridine-N-oxide derivative having the formula (CH.sub.3 COO).sub.n-1 CH.sub.4-n R' (III) wherein R' represents ##STR2## and n is 1 or 2 with acetic anhydride. The phenoxypyridine derivatives are especially suitable for producing synthetic pyrethroids having excellent insecticidal and acaricidal activity in high yield and an economical process.
具有公式(CH.sub.3 COO).sub.n CH.sub.3-n R (I)的苯并吡啶衍生物,在反应苯并吡啶-N-氧化物衍生物(CH.sub.3 COO).sub.n-1 CH.sub.4-n R' (III)(其中R'代表##STR2##,n为1或2)与乙酸酐反应后产生。这些苯并吡啶衍生物特别适合生产具有高产率和经济过程的优异杀虫和杀螨活性的合成拟除虫菊酯。