7-cyclopentyl-2-(5-formyl-pyridin-2-ylamino)-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide 、
1-(2-甲氧基乙基)哌嗪 以gave 7-cyclopentyl-2-{5-[4-(2-methoxy-ethyl)-piperazin-1-ylmethyl]-pyridin-2-ylamino}-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide (100 mg, 71%) [following SiO2 chromatography, eluting with 0-10% (2M NH3 in MeOH)/dichloromethane]的产率得到7-cyclopentyl-2-{5-[4-(2-methoxy-ethyl)-piperazin-1-ylmethyl]-pyridin-2-ylamino}-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide