申请人:Ciba-Geigy Corporation
公开号:US05075467A1
公开(公告)日:1991-12-24
An improved preparation of titanocenes of the formula I ##STR1## in which R.sub.1 is cyclopentadienyl.sup..crclbar., indenyl.sup..crclbar. or 4,5,6,7-tetrahydroindenyl.sup..crclbar., each of which is unsubstituted or monosubstituted or polysubstituted by C.sub.1 -C.sub.18 alkyl, C.sub.1 -C.sub.18 alkoxy, C.sub.2 -C.sub.18 alkenyl, C.sub.5 -C.sub.8 cycloalkyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.16 aralkyl, --Si(R.sub.3).sub.4, --Ge(R.sub.3).sub.4 or halogen, or the two R.sub.1 radicals together are a divalent radical of the formula II ##STR2## in which Z is --(CH.sub.2).sub.m -- where m=1, 2 or 3, unsubstituted or phenyl-substituted C.sub.2 -C.sub.12 alkylidene, --Si(R.sub.3).sub.2 -- or --Si(R.sub.3).sub.2 --O--Si(R.sub.3).sub.2 --, and R.sub.3 is C.sub.1 -C.sub.12 alkyl or C.sub.6 -C.sub.10 aryl, and R.sub.2 is six-membered carbocyclic aromatic ring which is substituted by fluorine in both the ortho-positions to the Ti-C bond and which may also have further substituents, involves the addition of certain lithium amides to a mixture of (R.sub.1).sub.2 TiX.sub.2 (X=halogen) and HR.sub.2 at -30.degree. C. to +25.degree. C.
一种改进的制备公式I的钛茂配合物的方法,其中R.sub.1是环戊二烯基.sup..crclbar.,茚基.sup..crclbar.或4,5,6,7-四氢茚基.sup..crclbar.,每个基团未被取代或单取代或多取代C.sub.1-C.sub.18烷基,C.sub.1-C.sub.18烷氧基,C.sub.2-C.sub.18烯基,C.sub.5-C.sub.8环烷基,C.sub.6-C.sub.10芳基,C.sub.7-C.sub.16芳基烷基,--Si(R.sub.3).sub.4,--Ge(R.sub.3).sub.4或卤素,或两个R.sub.1基团一起是公式II的二价基团##STR2##其中Z是--(CH.sub.2).sub.m--,m=1,2或3,未取代或苯基取代的C.sub.2-C.sub.12烷基亚甲基,--Si(R.sub.3).sub.2--或--Si(R.sub.3).sub.2--O--Si(R.sub.3).sub.2--,R.sub.3是C.sub.1-C.sub.12烷基或C.sub.6-C.sub.10芳基,R.sub.2是六元环碳氢芳香环,其在Ti-C键的正交位置上被氟取代,并且也可能有进一步的取代基团,包括将某些锂酰胺加入到(R.sub.1).sub.2TiX.sub.2(X=卤素)和HR.sub.2的混合物中,在-30℃到+25℃下进行。