Alkoxyphenyl N-Methylcarbamates as Insecticides12

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Abstract
Twenty-four new alkoxyphenyl N-methylcarbamates were prepared and evaluated as insecticides against the house fly (Musca domestica L.), mosquito larva (Culex quinquefasciatus Say), salt-marsh caterpillar (Estigmene acrea (Drury)) and citrus red mite (Panonychus citri (McG.)). Many of the compounds were highly insecticidal and the o- and m-ethoxy-, o- isopropoxy-, m-propoxy, 3,4-methylenedioxy-, 2,5-dimethoxy-, and 3,5-dimethoxyphenyl N-methylcarbamates were most active. The latter two compounds showed the highest toxicity and knockdown activity to the house fly. The compounds of this class were markedly synergized by piperonyl butoxide.