3-(4-Nitrophenyl)pyridine → 4-(Pyridin-3-yl)aniline

Beteiligte Stoffe

Reaktionsschritte

To a mixture of 3-pyridylboronic acid (500 mg, 4.06 mmol), 1-iodo-4-nitrobenzene (1.01 g, 4.06 mmol) and Pd(Ph3P)2Cl2 (140 mg, 0.199 mmol) in dioxane (15 mL), a solution of Na2CO3 (1.00 g, 9.43 mmol) in H2O (10 mL) was added. The mixture was stirred at 100 C for 2 h. Water and EtOAc were added. Organic phase was separated, washed with 5% NaHCO3, dried over Na2SO4, concentrated in vacuo. The residue was purified by a silica gel column on ISCO, eluted with 20-100% EtOAc in hexanes to give 3-(4-nitrophenyl)pyridine as a solid (487 mg). A mixture of 3-(4-nitrophenyl)pyridine (487 mg, 2.43 mmol) and Pd—C(10%, 80 mg) in MeOH (25 mL) and EtOAc (5 mL) was hydrogenated under balloon H2 for 5 h. The mixture was then filtered through celite. The filtrate was concentrated in vacuo to give 4-(pyridin-3-yl)aniline as a solid (403 mg).

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