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:
Jul. 25, 2023
Filed:
Oct. 21, 2021
Applicant:
Entegris, Inc., Billerica, MA (US);
Inventors:
Paul Hinkle, Wallingford, PA (US);
Scott A. Laneman, Vernon Hills, IL (US);
Victoria Weidner, Media, PA (US);
Assignee:
ENTEGRIS, INC., Billerica, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 3/02 (2006.01); C07C 1/32 (2006.01); C07F 17/00 (2006.01);
U.S. Cl.
CPC ...
C07F 3/02 (2013.01); C07C 1/326 (2013.01); C07F 17/00 (2013.01);
Abstract
Provided is a process for the mono-alkylation of cyclopentadiene, utilizing a cyclopentadiene magnesium halide and a metal salt of an alkyl or aryl sulfonate as co-reactant with an alkyl halide alkylating reactant. The process provides facile methodology for the mono-alkylation of cyclopentadiene, with conversions as high as about 96 percent and selectivity for mono-alkylation (over higher level alkylation, such as di- or tri-) as high as about 99%.