A base‐promoted cyclisation of 4‐nitroso‐5‐benzylsulphonamidopyrazoles (VII) afforded 6H‐pyrazolo[3,4‐c][1,2,5]thiadiazine‐2,2‐dioxides (VIII). They were tested in vitro for antifungal activity against a series of phytopathogenic fungi of different taxonomic classes. Five of the compounds had noteworthy activity; in particular 6H‐3‐phenyl‐5‐methyl‐7–(3,4‐dichlorophenyl) pyrazolo[3,4‐c][1,2,5]thiadiazine‐2,2‐dioxide (VIIIc) at the concentration of 200 mg litre−1 completely inhibited the growth of Pythium ultimum, Corticium solani and Sclerotinia minor. Copyright © 1990 Wiley Periodicals, Inc., A Wiley Company
Fungitoxicity of 6H-Pyrazolo[3,4-c] [1,2,5]thiadiazine 2,2-Dioxides
VICENTINI, Chiara Beatrice;BRANDOLINI, Vincenzo;VERONESE, Augusto;GUARNERI, Mario;GIORI, Paolo
1990
Abstract
A base‐promoted cyclisation of 4‐nitroso‐5‐benzylsulphonamidopyrazoles (VII) afforded 6H‐pyrazolo[3,4‐c][1,2,5]thiadiazine‐2,2‐dioxides (VIII). They were tested in vitro for antifungal activity against a series of phytopathogenic fungi of different taxonomic classes. Five of the compounds had noteworthy activity; in particular 6H‐3‐phenyl‐5‐methyl‐7–(3,4‐dichlorophenyl) pyrazolo[3,4‐c][1,2,5]thiadiazine‐2,2‐dioxide (VIIIc) at the concentration of 200 mg litre−1 completely inhibited the growth of Pythium ultimum, Corticium solani and Sclerotinia minor. Copyright © 1990 Wiley Periodicals, Inc., A Wiley CompanyFile in questo prodotto:
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