| Abstract: | During the course of investigation on organophosphorus insecticides, many organophosphorus compounds having methyl-, methyl-chloro-, methyl-nitro-, methyl-cyano-, methyl-thiocyano-, methoxy-nitro-, acyloxy-nitro-, and chloro-cyano-phenyl groups were prepared and their biological activities tested. As the results of these studies, two compounds were found as new low toxic organophosphorus insecticides, namely, O,O-dimethyl-O- (3-methyl-4-nitro-phenyl) and O,O-dimethyl-O- (4-cyanophenyl) phosphorothioates. |
