The present invention relates to processes for preparing methyl 4,6-diamino-2-[1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl]pyrimidin-5-yl}carbamate, i.e. the compound of the formula (I)
and to a process for purifying the crude product of the formula (I) for use as pharmaceutically active compound, where, for purification, methyl 4,6-diamino-2-[1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl]pyrimidin-5-yl}carbamate sulphinyldimethane (1:2) of the formula (II) is isolated as intermediate or is generated as intermediate in this purification process, if appropriate present in a mixture.
本发明涉及制备甲基4,6-二
氨基-2-[1-(2-
氟苯甲基)-1H-
吡唑并[3,4-b]
吡啶-3-基]
嘧啶-5-基}
氨基甲酸酯的过程,即化合物的式(I),以及用于作为药用活性化合物的粗品的纯化过程,其中,为了纯化,分离为中间体或在这一纯化过程中生成为中间体的甲基4,6-二
氨基-2-[1-(2-
氟苯甲基)-1H-
吡唑并[3,4-b]
吡啶-3-基]
嘧啶-5-基}
氨基甲酸酯磺酰二
甲烷(1:2)的式(II),如果合适的话可能存在于混合物中。