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:
May. 14, 2002
Filed:
Nov. 24, 1998
Applicant:
Inventors:
Jeffrey M. Sullivan, Loveland, CO (US);
Richard D. Crawford, Longmont, CO (US);
Assignee:
Boulder Scientific Company, Mead, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 1/20 ; C07C 1/26 ; C07C 1/315 ; C07C 2/200 ; C07C 2/700 ; C07C 2/900 ; C07C 3/302 ;
U.S. Cl.
CPC ...
C07C 1/20 ; C07C 1/26 ; C07C 1/315 ; C07C 2/200 ; C07C 2/700 ; C07C 2/900 ; C07C 3/302 ;
Abstract
A method for synthesizing tetramethylcyclopentadiene from 2,3-dibromobutane is described. A 2-bromo-2-butene Grignard is reacted with an ethyl formate to produce a 3,5-dimethyl-2,5-heptadiene-4-ol magnesium bromide which is then quenched with acetic acid to produce 3,5-dimethyl-2,5-hepadiene-4-ol.