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.
A process of forming compounds of formula I
comprising the steps of addition of an amino compound H
2
NR to a compound of formula (II)
followed by cyclization, isomerization and hydrolysis.
Novel Transition Metal Compound and Method for Preparing Polypropylene Using the Same
申请人:LG Chem, Ltd.
公开号:US20210189025A1
公开(公告)日:2021-06-24
The present disclosure provides a novel transition metal compound which exhibits excellent catalytic activity and is useful in the preparation of a polypropylene having high impact strength, and a method for preparing a homo polypropylene using the same.
Transition metal compound containing cationic groups which is used as an olefin polymerization catalyst component
申请人:Targor GmbH
公开号:US06552210B1
公开(公告)日:2003-04-22
Specifically substituted metallocenes can be used in the polymerization of olefins. The novel compounds contain a cationic group as substituents and are suitable as constituents of a catalyst system for the polymerization of olefins.