METHOD OF OBTAINING AND PURIFICATION GEMCITABINE HYDROCHLORIDE Russian patent published in 2009 - IPC C07H1/06 C07H19/73 

FIELD: chemistry.

SUBSTANCE: claimed invention relates to method of gemcitabine hydrochloride purification, which includes enriching gemcitabine hydrochloride with its p-anomer, according to which solution of gemcitabine hydrochloride in water is taken with ratio of water to gemcitabine hydrochloride from 3:1 to 12:1 (wt/vol); solution is processed with activated coal, activated coal being taken in amount from 0.1 to 10 wt % of gemcitabine hydrochloride amount in solution; activated coal is removed from solution with formation of filtered solution; concentration of gemcitabine hydrochloride in filtered solution is increased until ratio of filtered solution to gemcitabine hydrochloride equals from 1:1 to 1:5 (wt/vol), efficient for gemcitabine hydrochloride sedimentation; deposited gemcitabine hydrochloride is isolated; and in case admixture content in deposited gemcitabine hydrochloride is not reduced to required level, stages (a)-(e) are repeated. Claimed invention also relates to method of obtaining gemcitabine hydrochloride using claimed purification method.

EFFECT: creation of efficient method of gemcitabine hydrochloride purification.

5 cl, 1 tbl, 5 dwg, 8 ex