METHOD FOR PREPARING 2-[(3R)-3-METHYLMORPHOLIN-4-YL]-4-[1-METHYL-1H-PYRAZOL-5-YL)-8-(1H-PYRAZOL-5-YL)-1,7-NAPHTHYRIDINE
                        
                            
                                申请人:Bayer Aktiengesellschaft
                            
                            
                                公开号:US20210253573A1
                            
                            
                                公开(公告)日:2021-08-19
                            
                            The present invention covers a method for preparing 2-[(3R)-3-methylmorpholin-4-yl]-4-(1-methyl-1H-pyrazol-5-yl)-8-(1H-pyrazol-5-yl)-1,7-naphthyridine (“the compound of formula (I)” in the following) as well as intermediate compounds useful in the preparation of the compound of formula (I). The present invention also covers polymorphic form B of the compound of formula (I) with very high purity.