The present invention refers to indanone derivatives of formula (I)
wherein
R
1
is selected from hydrogen, methyl and ethyl;
R
2
is selected from hydrogen, methyl and ethyl, and R
3
is selected from hydrogen and methyl; or
R
2
and R
3
form together with the carbon atoms to which they are attached C
3
-C
5
cycloalkyl; and
R
4
is selected from C
2
-C
5
alkyl, C
2
-C
5
alkenyl, C
1
-C
4
alkoxy, C
3
-C
5
cycloalkyl, and C
3
-C
6
cycloalkenyl.
The invention further refers to perfume compositions and fragrance applications comprising them.
Process for the preparation of an olefin polymer using metallocenes
申请人:Hoechst AG
公开号:US05455365A1
公开(公告)日:1995-10-03
Process for the preparation of an olefin polymer using metallocenes containing specifically substituted indenyl ligands A highly effective catalyst system for the polymerization of olefins comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.5 is hydrogen or alkyl, R.sup.3 and R.sup.4 are alkyl, where R.sup.3, R.sup.4 and R.sup.5 may be halogenated, --(CR.sup.7 R.sup.8).sub.m --R.sup.6 --(CR.sup.7 R.sup.8).sub.n -- is a single- or multi-membered chain in which R.sup.6 may also be a (substituted) heteroatom, and m+n is zero or 1.
Process for the preparation of substituted indanones, and their use
申请人:Hoechst Aktiengesellschaft
公开号:US05329050A1
公开(公告)日:1994-07-12
1-Indanones of the formula IV or IVa ##STR1## in which R.sup.1 and R.sup.7 are preferably hydrogen or alkyl, or adjacent radicals R.sup.1 to R.sup.4 form a ring, are obtained in a one-step reaction by reacting a compound I ##STR2## with a compound of the formula II or a compound III ##STR3## in liquid hydrogen fluoride.
The invention relates to a process for the preparation of a compound of the formula IV or IVa ##STR1## in which R.sup.1 -R.sup.5 are preferably hydrogen or alkyl, which comprises reacting a compound I ##STR2## with a compound II ##STR3## in which X.sup.1 and X.sup.2 are preferably halogen, to give the corresponding indanones, which are converted into the compounds IV and IVa by reduction and dehydration. The compounds IV and IVa are important intermediate products for the preparation of chiral metallocene complexes which are suitable catalyst components for olefin polymerization.
Verfahren zur Herstellung substituierter Indene und ihre Verwendung als Ligandsysteme für Metallocen-Katalysatoren
申请人:HOECHST AKTIENGESELLSCHAFT
公开号:EP0545304A1
公开(公告)日:1993-06-09
Die Erfindung betrifft ein Verfahren zur Herstellung einer Verbindung der Formel IV oder IVa
worin R¹-R⁵ bevorzugt Wasserstoff oder Alkyl bedeuten, dadurch gekennzeichnet, daß man eine Verbindung I
mit einer Verbindung II
worin X¹ und X² bevorzugt Halogen bedeuten,
zu den entsprechenden Indanonen umsetzt, die durch Reduktion und Dehydratisierung in die Verbindungen IV und IVa überführt werden. Die Verbindungen IV und IVa sind wichtige Zwischenprodukte für die Herstellung von chiralen Metallocenkomplexen, die als Katalysatorkomponenten für die Olefinpolymerisation geeignet sind.
本发明涉及一种制备式 IV 或 IVa 化合物的工艺
其中 R¹-R⁵ 优选为氢或烷基,其特征在于化合物 I
与化合物 II
其中 X¹ 和 X² 最好是卤素、
得到相应的茚酮,然后通过还原和脱水转化为化合物 IV 和 IVa。化合物 IV 和 IVa 是制备手性茂金属络合物的重要中间体,可用作烯烃聚合的催化剂组分。