Efficacy of Organophosphorus Derivatives against Fungal Pathogens of Sugarcane
摘要:
Several novel oraganophosphorus derivatives have been prepared by the reactions of O,O-diethyl chlorophosphate/thiophosphate with three important series of heterocyclic compounds, viz., bis(mercaptotriazoles), bis(mercaptooxadiazoles), and bis(mercaptothiadiazoles). The derivatives have been characterized on the basis of analyses and spectral (IR, (1)H NMR, and (31)P NMR) data. The fungicidal activity of these derivatives against Colletotrichum falcatum, Fusarium oxysporum, and Curvularia pallescens have been evaluated. The screening results have been correlated with the structural features of the tested compounds. The greater potency has been observed with dithiophosphates compared to phosphates, with organophosphorus derivatives containing bis(mercaptotriazole) rings compared to other heterocyclic rings, and with long spacers between the rings.
Efficacy of Organophosphorus Derivatives against Fungal Pathogens of Sugarcane
作者:A. K. Jaiswal、G. P. Rao、O. P. Pandey、S. K. Sengupta
DOI:10.1021/jf970544t
日期:1998.4.1
Several novel oraganophosphorus derivatives have been prepared by the reactions of O,O-diethyl chlorophosphate/thiophosphate with three important series of heterocyclic compounds, viz., bis(mercaptotriazoles), bis(mercaptooxadiazoles), and bis(mercaptothiadiazoles). The derivatives have been characterized on the basis of analyses and spectral (IR, (1)H NMR, and (31)P NMR) data. The fungicidal activity of these derivatives against Colletotrichum falcatum, Fusarium oxysporum, and Curvularia pallescens have been evaluated. The screening results have been correlated with the structural features of the tested compounds. The greater potency has been observed with dithiophosphates compared to phosphates, with organophosphorus derivatives containing bis(mercaptotriazole) rings compared to other heterocyclic rings, and with long spacers between the rings.
A Facile Synthesis of Bis(4-amino-5-mercapto-1,2,4-triazol-3-yl)alkanes and Bis(5-mercapto-4H-1,2,4-triazol-3-yl)alkanes
The facile preparation of bis(4-amino-5-mercapto-1,2,4-triazol-3-yl)alkanes 1a–d and bis(5-mercapto-4H-1,2,4-triazol-3-yl)alkanes 2a–d in one-step is described.