PROCESS FOR PREPARING METHYL {4,6-DIAMINO-2-[1-(2-FLUOROBENZYL)-1H-PYRAZOLO[3,4-B]PYRIDIN-3-YL]PYRIMIDIN-5-YL}CARBAMATE AND ITS PURIFICATION FOR USE AS PHARMACEUTICALLY ACTIVE COMPOUND
The present invention relates to processss 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.本發明係關於用於製備{4,6-二胺基-2-[1-(2-氟苯甲基)-1H-吡唑並[3,4-b]吡啶-3-基]嘧啶-5-基}胺基甲酸甲酯(即式(I)化合物)之方法以及用於純化式(I)之粗產物作為醫藥活性化合物使用之方法,在純化時,式(II)之{4,6-二胺基-2-[1-(2-氟苯甲基)-1H-吡唑並[3,4-b]吡啶-3-基]嘧啶-5-基}胺基甲酸甲酯亞磺醯基二甲烷(1:2)在此純化方法中是以中間物分離或以中間物產生,如果適當時,以混合物存在。