2-氯-7-环戊基-N,N-二甲基-7H-吡咯并[2,3-d]嘧啶-6-甲酰胺 、 4-[(6-Amino-pyridine-3-carbonyl)-methyl-amino]-piperidine-1-carboxylic acid tert-butyl ester 以to give 7-cyclopentyl-2-[5-(methyl-piperidin-4-yl-carbamoyl)-pyridin-2-ylamino]-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide (46 mg, 16%)的产率得到7-cyclopentyl-2-[5-(methyl-piperidin-4-yl-carbamoyl)-pyridin-2-ylamino]-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide