Phosphoramides. IV. A New Synthesis of Biologically Important Formamidines.

Abstract
N-Aryl-N'',N''-dimethylformamidines represent a new class of pesticides. Especially interesting is the acaricide-insecticide N-(4-chloro-2-methylphenyl)-N'',N''-dimethylformamidien (chlordimeform). In a previous investigation N,N-dimethyl-N''-phenylformamidine was formed by refluxing formanilide in hexamethylphosphoric triamide (HMPT). As formanilide may be obtained by heating aniline and formic acid this opens up a new route.

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