Patent ID: 6472539
Filing Date: 2002-10-29
Classification: C07F

Abstract:
A process for producing a diphosphine oxide or diphosphonate represented by the following formula (1): wherein, R1 represents a C1-4 alkyl group, a C5-8 cycloalkyl group, a phenyl group, a substituted phenyl group substituted with 1 to 5 substituents which may be the same or different and each selected arbitrarily from the group consisting of C1-4 alkyl groups, C1-4 alkoxy groups and a phenyl group, a naphthyl group which may be substituted with a C1-4 alkyl group or a C1-4 alkoxy group, a C1-4 alkoxy group, a phenyloxy group, or a substituted phenyloxy group substituted with 1 to 5 substituents which may be the same or different and each selected arbitrarily from the group consisting of C1-4 alkyl groups, C1-4 alkoxy groups and a phenyl group, which comprisestreating, with a base, a phosphine oxide or a phosphonate compound represented by the following formula (2): â€ƒwherein, R1 has the same meaning as defined above, and adding the thus-treated phosphine compound to a solvent which consists essentially of a non-polar solvent having an oxidative metal compound suspended therein so as to effect dimerization.