Studies On Alkyloxophosphonic Acid Derivatives

The superior bioactivity of organic phosphorous compounds and fluorochemicals have received more attention in the recent years. In order to find new phosphonates and phosphinates with better herbicidal activity , the fluorous groups were introduced to the a -oxophosphonates and phosphinates. Some new kinds of a- (substituted phenoxyacetoxy) alkylphosphonates( I a-n and IIa-n), a -[3-(2-chloro-4-trifluoromethylphenoxy) benzoyloxy]alkylphosphonates (IIIa-1) and a -[2-(substituted phenoxy)propionyloxy]alkylphosphinates( IV a-d) were synthesized. Their structures are characterized by the following:The reaction conditions and synthesis methods of every kind of compounds were studied. The molecular structures of all compounds were confirmed by IR. 'HNMR, MS, elemental analysis and X-ray crystal structure diffraction. All compounds were tested for herbicidal activity and most of them were tested fungicidal or insecticidal activities. Some of compounds of I a-n, II a-n and IVa-d exhibited notable herbicidal activity, and some compounds tested by fungicidal and insecticidal activities showed poor activity.