US2012108670A1PendingUtilityA1

Formoterol tartrate process and polymorph

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Assignee: TANOURY GERALD JPriority: Nov 9, 2001Filed: Jan 4, 2012Published: May 3, 2012
Est. expiryNov 9, 2021(expired)· nominal 20-yr term from priority
Inventors:Gerald J. TanouryChris Hugh SenanayakeDonald W. Kessler
A61P 9/08A61P 9/00C07C 231/24A61P 11/08C07C 233/25A61K 31/205C07B 2200/13
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Claims

Abstract

A method of preparation of a highly pure salt of R,R-formoterol L-tartrate is disclosed. The process provides the most thermodynamically stable polymorph by recrystallization of a novel polymorph.

Claims

exact text as granted — not AI-modified
1 - 6 . (canceled) 
     
     
         7 . A method for preventing bronchoconstriction or inducing bronchodilation in a mammal comprising administering to said mammal a therapeutically effective amount of a highly pure (R,R)-formoterol L-tartrate comprising less than 0.5% by weight of chemical impurities other than formoterol L-tartrate; said chemical impurities including less than 0.1% by weight (based on total crystalline solid) of a compound of formula 8:

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