NOLAND W. E.; KAMESWARAN V.; LANDUCCI L. L., J. ORG. CHEM.,1980, 45, NO 23, 4564-4572
作者:NOLAND W. E.、 KAMESWARAN V.、 LANDUCCI L. L.
DOI:——
日期:——
Process for the preparation of substituted indenes
申请人:Hoechst Aktiengesellschaft
公开号:US05194619A1
公开(公告)日:1993-03-16
The compounds of the formula I or Ia ##STR1## in which R.sup.1 is alkyl, aryl, alkoxy, alkenyl, arylalkyl, alkylaryl, aryloxy, fluoroalkyl, halogenoaryl, alkynyl, trialkylsilyl or a heteroaromatic radical, R.sup.2, R.sup.3 and R.sup.4, in addition to hydrogen, have the meanings given under R.sup.1 and R.sup.5 is hydrogen, alkyl, fluoroalkyl or alkenyl, can be obtained in a one-stage process by reaction of a compound II ##STR2## with (substituted) cyclopentadiene in the presence of a base. The compounds I and Ia are suitable as ligands for metallocene complexes which are used as catalysts in olefin polymerization.
JONES D. W., J. CHEM. SOC. PERKIN TRANS., PART 1, 1979, NO 3, 673-676
作者:JONES D. W.
DOI:——
日期:——
Process for the preparation of an olefin polymer using metallocenes
申请人:Hoechst Aktiengesellschaft
公开号:US05304614A1
公开(公告)日:1994-04-19
A very active catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I or Ia ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen or alkyl, R.sup.5 and R.sup.6 are alkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n is a chain with one or more members, in which R.sup.7 can also be a (substituted) heteroatom, and m+n is zero or 1.