Geometrical isomer of o,o-diethyl...

Details Geometrical isomer of o,o-diethyl... Geometrical isomer of o,o-diethyl...

C - Chemistry, Metallurgy

07

F

260/460.3, 167/1

C07F 9/165 (2006.01) A01N 57/12 (2006.01)

Patent

CA 2012945

A geometrical isomer concerning the C=N bond in the molecule, which has the formula, Image and gives a 13C-NMR signal in deuterochloroform caused by the carbon atom of the C=N bond in lower magnetic field than does the other geometrical isomer is selectively prepared by allowing a phosphoric acid chloride having the formula, Image to react with a hydroxamate having the formula, Image in the presence of an acid-eliminating agent, water, cuprous ion and a phase transfer catalyst at a pH of 7.5-8.5. The geometrical isomer exhibits a high soil pest-controlling activity but shows a low toxicity. There- fore, it is extremely useful for an active ingredient of soil pest-controlling compositions.

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