5-(2-chloro-7-cyclopentyl-7H-pyrrolo[2,3-d]pyrimidin-6-yl)oxazole 、
4-(6-氨基吡啶-3-基)哌嗪-1-羧酸叔丁酯 以to give (7-cyclopentyl-6-oxazol-5-yl-7H-pyrrolo[2,3-d]pyrimidin-2-yl)-(5-piperazin-1-yl-pyridin-2-yl)-amine (25 mg, 24%)的产率得到(7-cyclopentyl-6-oxazol-5-yl-7H-pyrrolo[2,3-d]pyrimidin-2-yl)-(5-piperazin-1-yl-pyridin-2-yl)-amine