Patent ID: 6521795
Filing Date: 2003-02-18
Classification: C07B,C07C,C07F,C12C

Abstract:
A 6,6â€²-bis-(1-phosphanorbornadiene) diphosphine dioxide corresponding to the following formula: wherein:R1, R2, R3, R4, R5, identical or different, represent a hydrogen atom or a hydrocarbon radical optionally substituted, having from 1 to 40 carbon atoms, selected from a linear or branched, saturated or unsaturated acyclic aliphatic radical; a monocyclic or polycyclic, saturated, unsaturated or aromatic, carbocyclic or heterocyclic radical; a linear or branched, saturated or unsaturated aliphatic radical, carrying a cyclic substituent; R2 and R3 together with the carbon atoms which carry them optionally can form a saturated or unsaturated ring; R5 optionally can represent a radical of the formula in which R1â€², R2 â€², and R3â€² have the same meaning as that given for R1, R2 and R3; andR4 and R5 cannot simultaneously represent a phenyl group.