Method for reducing residual alcohols in crystalline...

Details Method for reducing residual alcohols in crystalline... Method for reducing residual alcohols in crystalline...

C - Chemistry, Metallurgy

07

D

C07D 473/18 (2006.01) C07D 473/00 (2006.01)

Patent

CA 2501557

Provided is a method of reducing excess residual process solvents, especially excess residual process alcohol (e.g. isopropanol), in valacyclovir hydrochloride to about 1000 ppm (weight) or less by contacting valacyclovir hydrochloride having excess residual process alcohol with moist gas.

La présente invention concerne un procédé pour réduire l'excès de solvants de traitement résiduels, notamment l'excès d'alcool de traitement résiduel (par ex. l'isopropanol) dans de l'hydrochlorure de valacyclovir pour obtenir une valeur de 1000 ppm (poids) ou moins, par mise en contact d'hydrochlorure de valacyclovir comprenant un excès d'alcool de traitement résiduel, avec du gaz humide.

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