ORGANISCHE PHOSPHORVERBINDUNGEN 841.HERSTELLUNG, EIGENSCHAFTEN UND BIOLOGISCHE WIRKUNG VON HYDRAZINOMETHYL-PHOSPHON- UND -PHOSPHINSÄUREN UND DERIVATEN

Abstract The synthesis and the chemical, physical, spectral and biological properties of hydrazinomethyl-phosphonic- and -phosphinic acids and derivatives, i.e. hydrazino-N-alkoxycarbonyl-N'alkylene-O,O-dialkoxyphosphonates, 2, -phosphinates, 3, hydrazinomethyl-O,O-diethylphosphonate, 4a. hydrazino-methylphosphonic acid 4b, hydrazinomethyl-O-isobutyl-methylphosphinate, 4c, hydrazinomethyl-methylphosphinic acid, 4d, and hydrazino-N-alkoxycarbonyl-N'-methylphosphonic acids, 5, are described and the reactions of these compounds with acyl chlorides, bromoacetates, and isocyanates are reported. Several of these compounds and, in particular, the chloroacetyl, 7, and dichloro-acetyl-derivatives, 8 and 9, show a good safening effect against the phytotoxic action of chloroacetanilide herbicides.