Sodium Bicarbonate → N-Boc-pyrrolidine

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2,6-(bis-pinocolato)diboranonaphthalene (0.501 g), 2-(5-bromo-1H-imidazol-2-yl)-pyrrolidine-1-carboxylic acid tert-butyl ester (0.885 g), and NaHCO3 (0.562 g) were dissolved in a mixture of 1,2-dimethoxyethanedichloromethane (15 mL) and water (5 mL). The solution was degassed with nitrogen, and Pd(PPh3)4 (0.0935 g) was added. The reaction mixture was stirred at 90° C. for 16 hours and evaporated under vacuum. Solid was dissolved in DCM (20 mL) and extracted twice with water and once with brine. Solution was evaporated, recrystallized from ethyl acetate, and dried under vacuum, giving 2-(5-{6-[2-(1′-carboxylic acid tert-butyl ester-pyrrolidin-2-yl)-3H-imidazol-4-yl]-naphthalen-2-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carboxylic acid tert-butyl ester (0.365 g, 46%) as a white solid.

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