Patent ID: 7569717

Claim:
A method for making optionally substituted diaryl alkylphosphonate comprising: reacting phosphorous trihalide of formula: PX 3 , or X a P(Oaryl) b wherein X is F, Cl, Br or I, a and b are 1 or 2 and a and b combined equals 3 and optionally substituted arylol of general formula (3): wherein R 3 , R 4 , R 5 , R 6 , and R 7 are, independently, hydrogen, C 1 -C 20 alkyl, aromatic or aryl group, trifluoromethyl, nitro, cyano, halide, C 1 -C 20 alkyl ether, benzyl halide, benzyl ether, aromatic or aryl ether, or substituted versions of these to form a first mixture; adding optionally substituted alkanol of 1 to 20 carbon atoms or more having at least one hydroxyl group substituent to the first mixture to form a second mixture; and heating the mixture to form optionally substituted diaryl alkylphosphonate of general formula (1); wherein R 1 may be an aromatic or aryl group, or a substituted aryl group of formula (2): wherein R 3 , R 4 , R 5 , R 6 , and R 7 may independently be any substituent including but not limited to hydrogen, C 1 -C 20 alkyl, aromatic or aryl group, trifluoromethyl, nitro, cyano, halide (F, Cl, Br, I), C 1 -C 20 alkyl ether, benzyl halide, benzyl ether, aromatic or aryl ether, or substituted versions of these.