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. 27, 2002
Filed:
Apr. 27, 2001
Alok Singh, Springfield, VA (US);
Paul Schoen, Alexandria, VA (US);
Dan Zabetakis, College Park, MD (US);
Joel M. Schnur, Burke, VA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
This invention pertains to a process for preparing diacetylenics, to diacetylenic compounds and to reduced diacetylenic compounds. The process includes the steps of reacting coupling an acetylenic acid in presence of cupric chloride in Ethylamine and hydroxylamine hydrochloride to form a diacetylenic diacid; reacting the diacetylenic diacid with a lithium compound, trimethylsilyl chloride and hydrochloric acid to form a diacetylenic compound; and reducing the diacetylenic compound to a reduced diacetylenic compound. The diacetylenic compounds have the formula COOH—(CH ) —C≡C—C≡C—(CH ) —C(═O)—R or R—C(═O)—(CH ) —C≡C—C≡C—(CH ) —C(═O)—R and the reduced cyclic diacetylenic compounds have the formula COOH—(CH ) —C≡C—C≡C—(CH ) —CH —R or R—CH —(CH ) —C≡C—C≡C—(CH ) —CH —R, where m is 1-18 and R is selected from alkyl groups of 1-10 and cyclic groups containing 6-35 carbon atoms and aryl moieties