A method of preparing a compound (I) of general formula (R3—C)2P—L1—X—L2—P—(C—R3)2, in which R is independently a pendant, optionally substituted, organic group through which the group is linked to tertiary carbon atoms C; L1 and L2 are independently, a linking group selected from an optionally substituted lower alkylene chain connecting the respective phosphorous atom to the group X, and X is a bridging group comprising an optionally substituted aryl moiety to which the phosphorous atoms are linked on available adjacent carbon atoms; comprising: (i) reacting together a compound (II) of formula A—L1—X—L2—A, in which A is a halogen atom, with a metal M in a suitable solvent or form an intermediate compound (III) of formula: A—M—L1—X—L2—M—A; (ii) reacting said intermediate compound (III) with a compound (IV) of formula: (R3—C)2P—A1, wherein A1 is a halogen atom which may be the same as or different from A, to form said compound (I).
一种制备通式(R3—C)2P—L1—X—
L2—P—(C—R3)2的化合物(I)的方法,其中R独立地是一个吊挂的、可选择取代的有机基团,通过该基团与三级
碳原子C相连;L1和
L2分别是选择自可选择取代的较低烷基链连接到X基团的
磷原子的连接基团,X是一个桥接基团,包括一个可选择取代的芳基部分,
磷原子与相邻的
碳原子连接;包括:(i)将通式为A—L1—X—
L2—A的化合物(II)与
金属M在适当的溶剂中反应,形成中间化合物(III)的步骤:A—M—L1—X—
L2—M—A;(ii)将所述中间化合物(III)与通式为(R3—C)2P—A1的化合物(IV)反应,其中A1是一种卤素原子,可以与A相同也可以不同,形成所述的化合物(I)。