Process and antiparasitic intermediates for doramectin

Details Process and antiparasitic intermediates for doramectin Process and antiparasitic intermediates for doramectin

C - Chemistry, Metallurgy

07

H

C07H 19/01 (2006.01) A01N 43/90 (2006.01) A01N 47/06 (2006.01) A61K 31/70 (2006.01) C07H 17/08 (2006.01)

Patent

CA 2173494

Intermediates and a process for preparing doramectin, the compound of formula (1), semisynthetically from by-product in the fermentation which also yields the compound of formula (I). The intermediates prepared by the process of this invention also have utility as antiparasitic agents. The process of this invention utilizes continuous reaction inert gas sparging during the pyrolysis step, resulting in a significant improvement in the overall yield of this conversion.

L'invention porte sur des intermédiaires, et un procédé associé, servant à la préparation de la doramectine, composé de formule (I), qui s'obtient par semi-synthèse à partir de sous-produits du processus de fermentation qui produit le composé de formule (I). Les intermédiaires préparés par ce procédé peuvent également servir d'antiparasites. Ledit procédé recourt pendant l'étape de pyrolyse à un barbotage par gaz inerte en continu d'où résulte une amélioration significative du rendement global de la transformation.

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