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US 5,859,278 AGranted
Method for preparing cyanophosphonate derivatives from pyrophosphate or polyphosphate esters and cyanide
AssigneeMonsanto Company
InventorsPatrick J. Lennon, Sergey G. Vulfson
Life of this patent
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Abstract
A process for preparing cyanophosphonate derivatives involves contacting a pyrophosphate ester or a polyphosphate ester and cyanide in a reaction mixture under conditions sufficient to produce the cyanophosphonate derivative. The cyanophosphonate derivative product can subsequently be hydrogenated to produce an aminomethylphosphonate derivative.
Claims47
A process for preparing a cyanophosphonate derivative comprising:
- contacting a pyrophosphate ester or a polyphosphate ester and a cyanide in a reaction mixture under sufficient conditions to produce a cyanophosphonate derivative.
A process for preparing an aminomethylphosphonate derivative comprising:
- contacting a pyrophosphate ester or a polyphosphate ester and a cyanide in a reaction mixture under sufficient conditions to produce a cyanophosphonate derivative, and
- hydrogenating the cyanophosphonate derivative in the presence of a suitable catalyst under sufficient conditions to produce an aminomethylphosphonate derivative.
Dependencies are inferred from the claim text.