Method for preparing sterically hindered aryl phosphites

C - Chemistry – Metallurgy – 07 – F

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C07F 9/145 (2006.01)

Patent

CA 2069619

-41- ABSTRACT A new process is disclosed for the manufacture of hindered aryl phosphites using derivatives of mercaptothiazole or dithiocarbamic acid as catalysts. Ortho-tertiary alkyl aryl phosphites are produced by the reaction of a phosphorus trihalide with an ortho-tertiary alkyl phenolic compound in the presence of the aforementioned catalysts.

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