Method of preparing montelukast and intermediates used therein

C - Chemistry – Metallurgy – 07 – D

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C07D 215/18 (2006.01) A61P 11/06 (2006.01)

Patent

CA 2673098

The present invention relates to a method for preparing montelukast, an inhibitor against leukotrienes, and an intermediate used therein. According to the inventive method, high-purity montelukast or its sodium salt can be prepared in a high yield.

L'invention concerne un procédé de préparation de montelukast, un inhibiteur des leukotriènes, et un produit intermédiaire utilisé dans ce procédé. Le procédé permet de préparer avec un rendement élevé du montelukast de grande pureté ou un sel sodique de ce composé.

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