Sodium Iodide → 2-iodo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(4-cyano-piperidin-1-yl)-1-cyclopropyl-2-oxo-ethyl]-amide

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In a 5 mL microwave vial were placed copper(I) iodide (5 mg, 0.027 mmol), sodium iodide (120 mg, 0.80 mmol), 2-bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(4-cyano-piperidin-1-yl)-1-cyclopropyl-2-oxo-ethyl]-amide (150 mg, 0.27 mmol), 1,4-dioxane (1 mL) and trans-N,N′-dimethylcyclohexane-1,2-diamine (8 mg, 0.054 mmol). The vial was purged with a stream of nitrogen then sealed and heated in an oil bath at 110° C. for 20 h. The reaction mixture was cooled to room temperature and quenched with sat'd aqueous NH4OH (3 mL) then diluted with water and extracted with CH2Cl2. The organics were dried over MgSO4 and concentrated. The residue was purified by silica gel chromatography with 50% to 80% EtOAc/hexanes to isolate 130 mg (80%) of 2-iodo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(4-cyano-piperidin-1-yl)-1-cyclopropyl-2-oxo-ethyl]-amide as an orange foamy solid.

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