To 4-[(5-bromo-3-methoxy-pyrazin-2-ylamino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester (EXAMPLE 131, STEP 1) (0.20 g, 0.0005 mol) in tetrahydrofuran (1 mL), under nitrogen, was added 1,3-bis(diphenylphosphino)propane nickel(II) chloride (0.034 g, 0.0625 mmol) followed by a dropwise addition of 2.0M dimethylzinc in toluene (0.313 mL, 0.000625 mol). The reaction mixture was stirred for 1.5 h, diluted with water (5 mL) and ethyl acetate (30 mL). The organic layer was removed, dried over sodium sulfate, filtered and concentrated to an oil. The oil was chromatographed on silica using a gradient of 20–50% ethyl acetate/hexane to give the title compound as a foam. M.S. (M+1): 337.
