A mixture of tert-butyl (1-(2-chloro-5-iodo-7-tosyl-7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidin-4-yl)methylcarbamate (418 mg, 0.647 mmol), Pd2(dba)3 (60 mg, 0.065 mmol), dppf (72 mg, 0.130 mmol) and Zn(CN)2 (91 mg, 0.778 mmol) in DMF (5 mL) was stirred at 70° C. for 20 h. DMF was removed in vacuo. The residue was loaded to a flash column, eluted with a gradient of 10-30% EtOAc in hexane to give tert-butyl (1-(2-chloro-5-cyano-7-tosyl-7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidin-4-yl)methylcarbamate (180 mg).
