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Novel Synthesis of Some Organophosphorus Derivatives as Chemotherapeutants against Fungal Pathogens of Sugracane | Abstract

Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry

ISSN: 0975-413X
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Abstract

Novel Synthesis of Some Organophosphorus Derivatives as Chemotherapeutants against Fungal Pathogens of Sugracane

Author(s): Kalpana Chaturvedi* and Smita Chaturvedi

The reactions of O,O-diethylchlorophosphate or O,O-diethylchlorothiophosphate with 1,4-phthalazine-bis(hydrazones), derived by the condensation of 1,4-dihydrazinophthalazine dihydrochloride monohydrate and 2-hydroxy benzaldehyde/4-hydroxy benzaldehyde/2- hydroxyacetophenone/4-hydroxyacetophenone, have been studied and a variety of organophosphorus derivatives have been obtained. The derivatives have been characterized on the basis of analyses and spectral (IR, 1H NMR) data and tested for their antifungal efficacy against colletotrichum falcatum, Fusarium oxysporum and Curvularia pallescens (all sugarcane pathogens). These compounds show promising results in inhibiting the mycelial growth of all the test fungi at 1000 ppm. Out of these, the most active compound is 0,0-diethylthiophosphate derivative containing 1,4-phthalazine-bis(2-hydroxyacetophenone) hydrazone(VII),which shows activity of 70.2% at 1000 ppm concentration against C.pallescence.


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