4-(6-amino-pyridin-3-ylmethyl)-1-methyl-piperazin-2-one 、
2-氯-7-环戊基-N,N-二甲基-7H-吡咯并[2,3-d]嘧啶-6-甲酰胺 以give 7-cyclopentyl-2-[5-(4-methyl-3-oxo-piperazin-1-ylmethyl)-pyridin-2-ylamino]-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide (11 mg, 21%) [following SiO2 chromatography eluting with 1-10% (2M NH3 in MeOH)/DCM]的产率得到7-cyclopentyl-2-[5-(4-methyl-3-oxo-piperazin-1-ylmethyl)-pyridin-2-ylamino]-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide