PYRROLO[2,3-D]PYRIMIDINE DERIVATIVE AS JANUS KINASE INHIBITOR
申请人:Incyte Holdings Corporation
公开号:EP3466953A1
公开(公告)日:2019-04-10
The present invention provides the use of 3-cyclopentyl-3-[4-(7H-pyrrolo[2,3-]pyrimidin-4-yl)-1H-pyrazol-1-yl]propanenitrile in the preparation of a medicament for use in the treatment of graft versus host disease.
The hydrogen atoms of the Me group in tetrafluoro-4-methylpyridine (I) are much less acidic than those of 4-picoline because of the Iπ effect of the fluorine atoms in positions 3 and 5. Free radical halogenation of the side chain of I occurs less readily than for 4-picoline and the resulting di- and trichloromethyl-tetrafluoropyridines can be hydrolysed to the corresponding aldehyde and acid.