Patent ID: 6376715
Filing Date: 2002-04-23
Classification: B01J,C07F

Abstract:
A method of manufacturing a compound of formula (I)(R3â€”C)2Pâ€”L1â€”Xâ€”L2â€”P(Câ€”R3)2, â€ƒâ€ƒ(I) in which each R is, independently, a pendant, optionally substituted, organic group through which the group is linked to tertiary carbon atom C; L1, L2 are, independently, a linking group selected from an optionally substituted C1 to C4 alkylene chain connecting the respective phosphorus atom to the group X, and X is a bridging group comprising an optionally substituted aryl moiety to which the phosphorus atoms are linked on available adjacent carbon atoms comprising: i) reacting together a compound of formula â€ƒHâ€”L1â€”Xâ€”L2â€”Hwith an organometallic compound to form an intermediate compound of formulaMâ€”L1â€”Xâ€”L1â€”M, where M is an alkali metal atom, andii) reacting said intermediate compound with a compound of formula (R3â€”C)2Pâ€”L1â€”Xâ€”L2 â€”P(Câ€”R3)2.