7-cyclopentyl-2-(5-formyl-pyridin-2-ylamino)-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide 、
1-BOC-(2S,6R)-2,6-二甲基哌嗪 以gave (2S,6R)-4-[6-(7-cyclopentyl-6-dimethylcarbamoyl-7H-pyrrolo[2,3-d]pyrimidin-2-ylamino)-pyridin-3-ylmethyl]-2,6-dimethyl-piperazine-1-carboxylic acid tert-butyl ester (170 mg, 74%) [的产率得到(2S,6R)-4-[6-(7-cyclopentyl-6-dimethylcarbamoyl-7H-pyrrolo[2,3-d]pyrimidin-2-ylamino)-pyridin-3-ylmethyl]-2,6-dimethyl-piperazine-1-carboxylic acid tert-butyl ester