Abstract
Abstract Interaction of 4-phenoxy and 4-pyridyloxy substituted 1.2-dinitrobenzenes and aminoalkylphosphonates,-phosphinates, and -phosphine oxides produces mainly 5-phenoxy- and 5-pyridyloxy substituted 2-nitrophenylaminoalkyIphosphonates. -phosphinates and -phosphine oxides (Table I to IV and Figure 1 to 5). some of which show high herbicidal and plant growth regulating activity. The herbicidal activity increases from pyridyloxy-phenylaminoalkylphosphonates to phenoxy-phenylaminoalkyl-phosphonates, -phosphinates, -phosphine oxides. Of all the compounds tested the phosphine oxide 4a was at all concentrations the most active compound.
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