| abstract |
New 2-nitromethylene-imidazolidine derivs. are of formula (I) In the formula R1 and R2 are each H, halo, 1-4C alkyl, 1-4C alkoxy, 1-4C alkylthio, CN, NO2, OH or CF3 (provided that R1 and R2 are not both H); or R+R2=methylenedioxy. (I) are insecticides. Typically when Dysdercus fasciatus or Oncopeltus fasciatus is sprayed to run-off with (I; R1 =4-Cl, R2 =H), a 0.006 wt. % spray gives 100% mortality of Dysdercus fasciatus and a 0.00075% spray gives 100% mortality of Oncopeltus fasciatus. Specific cpds. (I) include 1-(4-methoxybenzyl)-2-nitromethylene-imidazolidine. In an example, this was prepd. in a yield of 16.8g by refluxing 15.5g 1-nitro-2,2-bis-methylthio-ethylene and 27.4g N-(4-methoxybenzyl)-ethyl-enediamine 1 hr. in 150 ml methanol. |