Process for preparing 6-o-monoesters of castanospermine

C - Chemistry – Metallurgy – 07 – D

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C07D 471/04 (2006.01)

Patent

CA 2287316

The present invention relates to a process for preparing a compound of formula (I), wherein R is C1-C10 alkyl, phenyl or substituted phenyl, comprising treating a compound of formula (II), with bis(tributyltin) oxide in an organic solvent selected from the group consisting of o-xylene, m-xylene, p-xylene and mixed xylenes; and subsequently treating the reaction mixture with a compound of formula (III), wherein X is halogen and R is defined as above.

La présente invention concerne un procédé permettant la préparation d'un composé représenté par la formule (I) dans laquelle R est C1-C10 alkyle, phényle ou phényle substitué. Le procédé consiste à prendre un composé représenté par la formule (II) et à le traiter au moyen d'un oxyde de bis(tributyltine) dans un solvant organique appartenant au groupe des o-xylène, m-xylène, p-xylène et mélanges de xylènes. Le procédé consiste ensuite à traiter le mélange de réaction au moyen d'un composé représenté par la formule (III) dans laquelle X est halogène, R étant tel que défini précédemment.

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