Studies on Syntheses and Biological Activities of Novel Triazole Compounds Containing Phosphorodithioate Groups

Sixteen new triazole organic phosphorus compounds were synthesized. Their structures were confirmed with IR, 1H NMR, elemental analysis and MS. The primary biological tests show that the titled compounds have the fungicidal activities, which are influenced by R groups and the substituents attached to the P atom.

Hydrolysis of Phosphorodithioates with a Seven-membered Ring( Ⅰ )——Kinetics and Mechanism of Acidic Hydrolysis

Introduction The phosphorodithioate is an important organophosphate pesticide. The hydrolysis reactions are very important to the metabolism of the pesticides. There have been many papers published in this domain concerning the hydrolysis of organophosphate esters. Studies on the hydrolysis of phosphorodithioate esters with a seven-membered ring, however, have rarely been reported. O, O-biphenyl S-alkyl phosphorothiolothionates with notable biological activities have recently been synthesized. In the present pater, UV spectroscopic method and molecular orbital calculation are used to carry out a research into the kinetics and-mechanisms of their hydrolyses.

Additive-free synthesis of β-keto phosphorodithioates via geminal hydro-phosphorodithiolation of sulfoxonium ylides with P_(4)S_(10)and alcohols

A simple and additive-free protocol has been developed for the preparation ofβ-keto phosphorodithioates through the three-component reaction of easily available sulfoxonium ylides,P_(4)S_(10),and alcohols.The present geminal hydro-phosphorodithiolation reaction was performed at room temperature to construct a series ofβ-keto phosphorodithioates in the absence of any metal reagents,bases,or additives.

Visible-light-induced four-component difunctionalization of alkenes to construct phosphorodithioate-containing quinoxalin-2(1H)-ones

A facile visible-light-induced 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene(4Cz IPN)catalyzed fourcomponent reaction of alkenes,quinoxalin-2(1H)-ones,P4S10and alcohols has been developed at room temperature.This tandem reaction provides an efficient strategy for the construction of various phosphorodithioate-containing quinoxalin-2(1H)-ones with moderate to good yields by using air(dioxygen)as the green oxidant.Experimental studies revealed a radical process was involved in this photochemical reaction.