Process for the preparation of acid esters and compositions tiofosforico nematicides and the basis of these soil insecticides

摘要

1348459 Pesticidal thionophosphoric acid esters BAYER AG 2 Oct 1972 [2 Oct 1971 19 Feb 1972] 45346/72 Heading C2P Novel compounds of Formula I where R 1 and R 2 are C 1-4 alkyl, X is chlorine or bromine and n is 0 to 4 may be prepared by reacting a compound of Formula II where Hal is halogen, with a compound of Formula III where M is hydrogen or a cation, in the presence (if M is hydrogen) of an acid binder. The compounds of Formula I have nematocidal, insecticidal (especially soil-insecticidal), acaricidal, fungitoxic and herbicidal activity, and may be used as the active ingredients in conventional pesticidal compositions.