The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 1999
Filed:
Jan. 22, 1998
Applicant:
Inventors:
Richard Herman Woudenberg, Elst, NL;
Heert Andringa, Deventer, NL;
Assignee:
Akzo Nobel N.V., , NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07F / ; C07C / ;
U.S. Cl.
CPC ...
556 11 ; 556-8 ; 556 12 ; 568323 ; 568328 ;
Abstract
The invention relates to a process of preparing a 2-alkyl-2,3-dihydro-1H-benz�e!indene-1-one derivative, preferably 2,3-dihydro-2-methyl-benz�e!indene-1-one, characterized in that a naphthalene derivative is condensed with an active ester of 2-alkyl-2-propenoic acid, preferably with 2-methyl-2-propenoyl chloride. The product which is obtained in high yield and substantially free from its isomer is an intermediate in the preparation of rac-dimethyl bis(2-alkyl-1H-benz�e!indenyl)silandiyl zirconium dichloride complex.