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. 07, 2001
Filed:
Apr. 13, 1998
K. C. Nicolaou, La Jolla, CA (US);
Wolfgang Wrasidlo, Berlin, DE;
Rodney K. Guy, Dallas, TX (US);
Emmanuel Pitsinos, Strasbourg, FR;
The Scripps Research Institute, La Jolla, CA (US);
Abstract
Onium salts of taxo-diterpenoid-C,,2-O-aza-arenes form water soluble self-assembling nanostructures above a critical aggregation concentration. The onium salt of aza-arene includes a delocalized charge which renders derivatized taxo-diterpenoids amphoteric, enhances their solubility in water, and promotes self-assembly of water soluble nanostructures, e.g., helical fibular structures and spherical micellular structures. These same onium salts of taxo-diterpenoid-C,,2-O-aza-arenes are employed as water soluble prodrugs. For example, taxol-2′-methylpyridinium tosylate (MPT) is characterized by an elevated aqueous solubility, rapid activation by serum protein, good stability in most other aqueous solutions, formation of a protein:taxol intermediate and good retention within the circulatory system. The toxicity of the activated form is comparable or greater than underivatized taxol. Furthermore, taxol-2′-MPT can be synthesized by a simple one step reaction between taxol and 2-fluoro-1-MPT. The invention is applicable to taxol and taxol memetics having hydroxyls that are reactive with onium salts of 2-halogenated-aza-arenes. For example, taxol, C-2 substituted taxol and Taxotere each have reactive hydroxyls at the 2′ and 7 positions. The invention is also applicable to a wide array of 2-halogenated-aza-arenes.