Derivatives of 2-nitro-4- or -5-pyridyloxyphenylphos- phonic acid, the preparation thereof, the use thereof

Abstract From the Canadian patent

Derivatives of 2-nitro-4- or -5-pyridyloxyphenylphosphonic acid, the preparation thereof, the use thereof as herbicides and/or plant growth regulators and/or microbicides intermediates employed for obtaining said derivatives the, preparation thereof and use thereof as herbicides Abstract, The invention relates to novel 2-nitro-4- or -5-pyridyloxyphenylphosphonic acid derivatives of the formula wherein X is halogen or trifluoromethyl Y is hydrogen or, halogen, one of the two substituents A and E is a phosphonate group -?(OR)2, wherein R is C1-C4alkyl or hydrogen and, the other is a nitro group, including the metal salts thereof and the salts thereof with ammonium and organic nitrogen bases, …