Patent ID: 6437164
Filing Date: 2002-08-20
Classification: C07F

Abstract:
A method for producing a phosphonite compound comprising phosphinobiphenylene of the formula: wherein R is a hydrogen atom or methyl and R1 and R2 are each a hydrogen atom or alkyl having 1 to 5 carbon atoms, which method comprisingreacting biphenyl and phosphorus trichloride in the presence of aluminum chloride, removing a hydrogen chloride gas generated, adding a pyridine, removing excess phosphorus trichloride, reacting a resulting reaction product containing a phosphine compound of the formula: and a phenol compound of the formula: wherein R is a hydrogen atom or methyl and R1 and R2 are each a hydrogen atom or alkyl having 1 to 5 carbon atoms, in the presence of a base as a deacidifying agent, andremoving hydrochloride of said base and a pyridine-aluminum chloride complex.