2-氯-7-环戊基-N,N-二甲基-7H-吡咯并[2,3-d]嘧啶-6-甲酰胺 、 N-{(E)-2-[(S)-3-(tert-butyl-dimethyl-silanyloxy)-pyrrolidin-1-yl]-vinyl}-acrylamidine 、
四丁基氟化铵 以to give 7-cyclopentyl-2-[5-(3-hydroxy-azetidin-1-yl)-pyridin-2-ylamino]-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide (18 mg, 46%)的产率得到7-cyclopentyl-2-[5-(3-hydroxy-azetidin-1-yl)-pyridin-2-ylamino]-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide