Process for preparing dideoxyinosine using adenosine...

C - Chemistry – Metallurgy – 12 – P

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C12P 19/40 (2006.01) C07H 19/16 (2006.01)

Patent

CA 2517674

A method of making didanosine (ddI) including the steps of: (a) obtaining an enzyme expressing ddA deaminase activity; (b) immobilizing the enzyme onto an insoluble support; (c) contacting the enzyme with a dideoxyadenosine (ddA) solution of at least about 4% weight volume ddA in water for a time and under conditions to produce a ddI solution; and (d) isolating the ddI from the ddI solution. Optionally, the ddI mother liquor is reused in subsequent runs to improve yield.

La présente invention a trait à un procédé de fabrication de didanosine comprenant les étapes suivantes : (a) l'obtention d'une enzyme exprimant une activité de didéoxyadénosine désaminase ; (b) l'immobilisation de l'enzyme sur un support insoluble ; (c) la mise en contact de l'enzyme avec une solution de didéoxyadénosine d'au moins 4 % en volume pondéral de didéoxyadénosine dans l'eau pour un intervalle de temps et sous des conditions aptes à produire une solution de didanosine; et l'isolement de la didanosine de la solution de didanosine. La solution-mère de didanosine peut éventuellement être réutilisée dans des passes ultérieures pour l'amélioration de rendement.

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