2002•Indian Journal of Chemistry Section B-organic Chemistry Including Medicinal ChemistryRequires access

Synthesis and biological assay of O, O-diaryl O-2-chloroethyl phosphorothionates against Rhizoctonia solani and Sclerotium rolfsii

T. K. Chattapadhyay, R. L. Gupta

Abstract

Twenty new O,O-diaryl O-2-chloroethyl phosphorothionates, having different phenyl substitutions, have been synthesized and characterized by physico-chemical techniques. The compounds have been evaluated for their fungicidal activity against two phytopathogenic fungi viz., Rhizoctonia solani and Sclerotium rolfsii. The most active compounds are O,O-di(pentachlorophenyl) O-2-chloroethyl phosphorothionate (ED 5 0 =0.419 mgmL - 1 ) and O,O-di(2-methylphenyl) O-2-chloroethyl phosphorothionate (ED 5 0 =0.426 mg mL - 1 ) against R. solani and S. rolfsii respectively.

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Key concepts: Sclerotium, Rhizoctonia solani, Fungicide, Rhizoctonia, Chemical structure, Chemistry, Horticulture, Botany