38176-72-6Relevant articles and documents
In search of new organophosphorus pesticides and insecticides. Part III: Synthesis and anticholinesterase studies of 3-(subs)-quinoxy/pyridinoxy/cyclica mino-2,3-dihydro-2-(4-chlorophenyl)-1H-naphth [1,2-E][1,3,2] oxazaphosphorine 3-sulfides
Bull, E.O. John,Naidu
, p. 9 - 20 (2000)
In situ treatment of (cyclic) amino derivatives with the product obtained from the cyclocondensation of 1-p-chloroanilinomethyl naphthol-2 and thiophosphoryl chloride in dry benzene-THF afforded the titled oxazaphosphorine sulfides in good yield. Subsequently, the reaction of pyridinoxy/quinoxythiophosphorodi chloridates and 1-p-chloro anilino methyl naphthol-2 in dry benzene-THF mixture gave the corresponding pyridinoxy/quinoxy oxaza phosphorine 3-sulfides in quantitative yield. All the condensations proceeded smoothly by employing triethylamine to scavenge the liberated hydrogen chloride gas. Anticholinestease studies of these compounds indicated very high degree of inhibition several times higher than the reference standard-methyl parathion.
Distribution and degradation of 14C-ethyl prothiofos in a potato plant and the effect of processing
Abdel-Gawad,Afifi,Abdel-Hameed,Hegazi
experimental part, p. 2734 - 2751 (2009/09/06)
Prothiofos and some of its degradation products have been synthesized in our laboratory for investigation purposes. The residual fate of 14C-ethyl prothiofos in different parts of potato plant was studied. The highest level of insecticide residues was detected in and on the leaves of potato plants. The residues of prothiofos insecticide were mainly located in the peels of potato tubers (peeling process removed 85% of the total residue after one month of the treatment), small amount penetrated into the pulp of potato tubers. The degradation products in the extracts of both peel and pulp of potato tubers were identified as prothiofos, prothiofos oxon, desethyl prothiofos, O-ethyl-S-propyl phosphorodithioate, O-ethyl phosphorothioate, O-ethyl-S-propyl phosphoric acid, O-ethyl phosphoric acid, despropylthio prothiofos, and prothiofos oxon sulfoxide. In addition 2,4-dichlorophenol was identified as such and in conjugated metabolites. Potatoes are processed in three ways: frying, boiling, and baking, which is simulated in home preparation. The amount of prothiofos residues was found to decrease on boiling (70%) and further on baking (82%) and frying (100%). The results indicated that frying process is the most effective method for reducing the amount of pesticide residues. Detectable residues were found in boiled potatoes (2.64 ppm), in the boiling water (0.24 ppm), and in the frying oil (0.71 ppm). From these results we concluded that the processed potatoes are safely used for human consumption. Copyright Taylor & Francis Group, LLC.
Thermal and spectral studies on cellulose arylthiophosphates in air
Singh, Ranbir,Arora, Sanjiv,Lal, Krishan
, p. 18 - 24 (2007/10/03)
The thermal behaviour of cellulose and cellulose arylthiophosphate samples have been studied using DTA and TG techniques from ambient temperature to 600°C in static air atmosphere. First exotherm in DTA curves of cellulose arylthiophosphate samples caused
