Process for preparing...

Details Process for preparing... Process for preparing...

C - Chemistry, Metallurgy

07

F

C07F 9/6574 (2006.01) C07F 9/6571 (2006.01)

Patent

CA 2158393

Optionally substituted ODOP is obtained by reaction of optionally substituted o-phenylphenol with PCl3 in the presence of Lewis acids at elevated temperature in a first stage, with according to the invention an excess of at least 0.05 mol of PCl3 per mol of o-phenylphenol being maintained during the entire reaction time,and, after removal of the PCl3, by hydrolysis in a second stage using 1 - 2 mol of H2O per chlorine equivalent of the product of the first stage at 50 - 150°C and with removal of HCl and residual H2O.

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