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:
Mar. 17, 1998
Filed:
Dec. 27, 1993
Michael J Mullins, Midland, MI (US);
Ray E Drumright, Midland, MI (US);
Alan D Cardin, Cincinnati, OH (US);
Norton P Peet, Cincinnati, OH (US);
Merrell Pharmaceuticals, Inc., Cincinnati, OH (US);
The Dow Chemical Co., Midland, MI (US);
Abstract
The present invention relates to achiral polyurea oligomers, their uses and formulations as anti-HIV pharmaceuticals and to a process for the preparation of narrow mono- and polydispersed oligomers as an emodiment of the invention. The achiral oligomers are derived from repeating units of the monomer 4,4'-diamino-biphenyl-3,3'-disulfonic acid and are water soluble, have a rigid backbone, possess ordered anionic spacing and have a number average molecular weight of <20,000. The process relates to the synthesis of narrow poly- and mono-dipersed oligomers comprising the steps of: 1) restricting the crude olydispersed anionic oligomer mixture to a narrow polydispersed anionic oligomer mixture to a narrow polydispersed anionic oligomer mixture; and/or 2) isolating the monodispersed anionic oligomer; and 3) optionally converting the narrow poly- or mono-dispersed anionic oligomer salt from Step 1 or 2 to a desired pharmaceutically-acceptable salt, especially a solim or potassium salt. The process steps may be executed whereby step 1 or 2 is done alone, each in combination with Step 3, or all three steps are done.