Patent ID: 6790974
Filing Date: 2004-09-14
Classification: C07C,C07F,G03G,H01L,Y10T

Abstract:
A process for producing a diphosphonic ester of formula [VII] which comprises reacting an aryl halide compound of formula [IX] and a trialkyl phosphite of formula [X]Formula [X]P(OR72)3 or P(OR73)3 whereinR72 and R73 are hydrocarbon moietiesR74 is selected from the group consisting of â€”CN, â€”CCF3, and â€”NO2 R75 is selected from the group consisting of â€”H, â€”CN, â€”CCF3, â€”NO, â€”F, Cl, Br, and â€”I and X is a halogen atom.