Patent ID: 7750180

Claim:
A process for the preparation of a product corresponding to the formula: or a phosphonic acid ester or salt thereof, wherein R 1 is selected from the group consisting of substituted or unsubstituted alkyl, alkynyl, aryl, aralkyl, aralkenyl or aralkynyl, R 2 and R 3 are independently selected from the group consisting of hydrogen, nitro, cyano and substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl, aralkenyl or aralkynyl and R 4 is selected from the group consisting of cyano and a substituent corresponding to the formula: wherein R 5 is hydrogen or a moiety forming a carboxylate salt or ester, the process comprising: contacting a halomethylphosphonic acid reactant with an amine reactant, said halomethylphosphonic acid reactant comprising halomethylphosphonic acid, a halomethylphosphonic acid salt halomethylphosphonic acid ester, or mixtures thereof, said amine reactant comprising a compound corresponding to the formula: wherein R 1 , R 2 , R 3 and R 4 are as defined above, or a dimer, oligomer or polymer of a compound of Formula III in which R 4 corresponds to Formula II.