ChemInform Abstract: INVESTIGATIONS ON PHOSPHORIC ACID AND THIOPHOSPHORIC ACID ESTERS WITH A HETEROCYCLIC SUBSTITUENT. 10TH AND LAST COMMUNICATION. AZA ANALOGY. II- DERIVATIVES OF OXAZOLO(4,5-B)PYRIDIN-2(3H)-ONE, AN AZA ANALOG OF BENZOXAZOL-2(3H)-ONE

1976 ◽  
Vol 7 (41) ◽  
pp. no-no
Author(s):  
KURT RUEFENACHT ◽  
HAUKAR KRISTINSSON ◽  
GUENTER MATTERN
1953 ◽  
Vol 8 (5) ◽  
pp. 225-232 ◽  
Author(s):  
R. Gasser

Es wird die Verwendung von Thiophosphorsäure-[2-isopropyl-4-methyl-pyrimidyl-(6)]-diäthylester (Diazinon) als Insektizid im Pflanzen- und Vorratsschutz und in der Hygiene beschrieben. Die akute orale Toxizität, DL 50 in mm3/kg Körpergewicht, beträgt an der Maus 96, an der Ratte 235, am Meerschweinchen 320, am Kaninchen 130. Die chronische Toxizität liegt z. B. an der Ratte günstiger als jene von Dichlordiphenyl-trichloraethan. Diazinon zeigt, wie andere Phosphorsäureester, eine starke Hemmung der Cholinesterase. Auf Insekten und Spinnmilben hat es eine Kontakt-, Fraß- und Gaswirkung. Auf Pflanzen appliziert, weist es wohl eine Tiefen-, aber keine systemische Wirkung auf. Aus den verschiedenen Applikationsgebieten ist vor allem die gute Wirkung gegen Lepidopteren und Dipteren hervorzuheben. Letztere ermöglicht den Einsatz von Diazinon zur Bekämpfung der resistenten Fliegen.The use as an insecticide for the protection of plants and stores of thiophosphoric acid [2-isopropyl-4-methyl-pyrimidyl-(6)]-diethylester (Diazinon) is described. Its hygienic use is also described. The acute oral toxicity, DL 50 in mm3/kg body weight, is, for the mouse 96, for the rat 235, for the guinea pig 320, for the rabbit 130. The chronic toxicity is more favourable, for example in the rat, than that of Dichlordiphenyl-trichlorethane. Like other phosphoric acid esters, Diazinon greatly inhibits cholinesterase. It acts as a contact, stomach and gas poison on insects and red spiders. Applied to plants it certainly has a deep, but not a systemic action. Of all the various possibilities for application, its good action on Lepidoptera and Diptera is of particular importance. Diazinon can thus be used for the control of resistent flies.


ChemInform ◽  
2010 ◽  
Vol 25 (7) ◽  
pp. no-no
Author(s):  
R. WINTER ◽  
G. L. GARD ◽  
R. MEWS ◽  
M. NOLTEMEYER

1980 ◽  
Vol 35 (6) ◽  
pp. 727-730
Author(s):  
Oemer Saygin ◽  
Peter Decker

Abstract Nonenzymatic catalysis by bivalent ions of Be, Mg, Ca, Zn, Mn, Ni and Co and bioorganic phosphates of the formation of hydroxamic acids from acetate or amino acids has been studied systematically. Increased yields of hydroxamate were observed at particular combinations of reactants. The most prominent increase (ca. 15-fold) was found with acetate and Ni++, and with a combination of ATP and Be++. Among others especially ribose-5-phosphate and glucose-5-phosphate enhanced yields in the presence of most metal ions. Since no release of inorganic phosphate was observed, this effect cannot be interpreted as an evidence for intermediate transhosphorylation reactions; it may also result from simple catalytic effects of metal sugar complexes.


2020 ◽  
Vol 36 (05) ◽  
pp. 976-979
Author(s):  
Neeta Sinha

The derivatives of 3-ferrocenyl isocoumarin were synthesized by the condensation of substituted homothphalic anhydride with ferrocene using phosphoric acid or anhydrous aluminium chloride as cyclising agent. Substituted homophthalic acid did not condense with ferrocene so homophthalic acids were converted into their anhydride and then allowed to react with ferrocene in the presence of polyphosphoric acid or in the presence of anhydrous aluminium chloride using dichloromethane as the solvent to give 3-ferrocenyl isocoumarins. 7-Methoxy, 6-methyl, 5,7-dihydroxy, 6,7-dimethoxy and 5,7-dimethoxy derivatives of 3-ferrocenyl isocoumarin were synthesized. All the compounds were characterised by melting point determination, elemental and spectral analysis.


Synthesis ◽  
1991 ◽  
Vol 1991 (03) ◽  
pp. 201-204 ◽  
Author(s):  
M. Froneman ◽  
T. A. Modro

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