| abstract |
The invention relates to a method for preparing dialkyl phenyl-phosphonite which is a key intermediate of acyl phosphate photoinitiator. The method takes benzene, phosphorus trichloride and alcohol as main materials and synthesizes dialkyl phenyl-phosphonite through a two-step reaction. The method has the improvements that: in the second step of reaction, phenyldichlorophosphine reacts with the alcohol to synthesize the object under the condition of non-catalyst, the reaction temperature is controlled within 10 DEG C below zero to 10 DEG C, and phenyldichlorophosphine is dropwise added; and then the reaction is carried out under the condition of stirring at the temperature of 30 to 50 DEG C for 0.5 to 7 hours. The invention has the advantages of low cost, easy post treatment, high yield, and the like and is suitable for industrial production. |