Methanethionophosphonic acid esters - insecticides and acaricides

摘要

Insecticides and acaricides of formula I, where X, Y and Z = H, Cl, Br, I, alkyl, -S-alkyl, -SO alkyl, -SO2 alkyl, CO2 alkyl, opt. subst. CONH2, opt. subst. -SO2NH2, or (Z only) CN, and R = alkyl or are prepd. from chloromethylthionophosphonic acid chloride by (a) esterifying in one or two stages with the corresp. phenol, or with alkanol and phenol, and (b) reducing the ClCH2- gp. with Zn powder and a carboxylic acid at 50-120 degrees.