Patent ID: 6288279
Filing Date: 2001-09-11
Classification: C07B,C07C,C07F,C12C

Abstract:
A 6,6'-bis-(1-phosphanorbornadiene) diphosphine corresponding to formula (I): ##STR43##wherein:(a) R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 are the same or different and are selected from the group consisting of a hydrogen atom, an acyclic aliphatic radical, an aromatic radical, a carbocyclic radical, a heterocyclic radical, and an aliphatic radical having a cyclic substituent; wherein R.sub.4 and R.sub.5 cannot simultaneously represent an unsubstituted phenyl group;(b) R.sub.1 and R.sub.4 are as defined in (a) above, R.sub.5 is as defined in (a) above or (c) below, and R.sub.2 and R.sub.3 together form a saturated or unsaturated ring; or(c) R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as defined in (a) and (b) above, and R.sub.5 is ##STR44##wherein R.sub.1 ', R.sub.2 ' and R.sub.3 ' have the same meaning as R.sub.1, R.sub.2 and R.sub.3, respectively.