Patent ID: 7741505

Claim:
A preparation method for bisbiphenylacylphosphine oxide, the bisbiphenylacylphosphine oxide represented by the following structural formula (I), wherein —Ar— is a phenyl group, the method comprising: heating an excess phosphorus trichloride and a 2-phenylphenol with at least one catalyst to form a 10-chloro-9,10-dihydro-9-oxa-10-phosphaphenanthrene (CDOP) wherein the CDOP is represented by the following structural formula (II); removing the remaining phosphorus trichloride; esterifying the CDOP to become a 6-methoxy-(6H)-dibenz[c,e][1,2]oxa-phosphorin (MDOP) wherein the MDOP is represented by the following structural formula (III); and conducting an Arbuzov reaction with the MDOP and an acid chloride compound to form the bisbiphenylacylphosphine oxide which has the structural formula (I).