3-[4-(6-amino-pyridin-3-yl)-piperazin-1-yl]-propionitrile 、
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gave 2-{5-[4-(2-cyano-ethyl)-piperazin-1-yl]-pyridin-2-ylamino}-7-cyclopentyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide (34 mg, 10%) [following purification by preparative LCMS]的产率得到2-{5-[4-(2-cyano-ethyl)-piperazin-1-yl]-pyridin-2-ylamino}-7-cyclopentyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide