Process for the preparation of cyclic phosphites

Details Process for the preparation of cyclic phosphites Process for the preparation of cyclic phosphites

C - Chemistry, Metallurgy

07

F

260/457.4

C07F 9/6574 (2006.01) C07F 9/146 (2006.01)

Patent

CA 1241964

A process for the preparation of cyclic phosphites Abstract of the Disclosure The present invention relates to a process for the preparation of pentaerythritol esters of phosphorous acid derivatives by reacting pentaerythritol with a phosphorous trihalide and a phenol in the presence of a quaternary salt or a polyether. The use of such catalysts is not only able to improve the yield, but also makes it possible for the entire process to be carried out in one step by adding the phenol at the start of the reaction of pentaerythritol with the phosphorous halide.

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