2-Bromopyridine → 6-methyl-N-phenyl-N-pyridin-2-ylpyridin-2-amine

関与物質

反応手順

To a flask were added 18.4 g of 6-methyl-N-phenylpyridin-2-amine, 15.8 g of 2-bromopyridine, 11.5 g of sodium tert-butoxide, and 250 ml toluene. The mixture was purged thoroughly with nitrogen and 270 mg of 1,1′-bis(diphenylphosphino)ferrocene and 110 mg of palladium acetate were added. The reaction mixture was heated to 90 C for 6 hours, and then cooled to 22 C. After quenching with 100 ml water, the product was extracted with 75 ml ethyl acetate. The product was extracted with 50 ml of 1M hydrochloric acid, and then basified with sodium hydroxide. The mixture was cooled to 5 C, and the crude product was filtered and washed with water. The product was dissolved in 100 ml hot 2-propanol and treated with 0.4 g activated carbon. After hot filtration through a bed of celite, 150 ml of water was added slowly and the mixture was seeded to induce crystallization. After cooling to 5 C, the product was filtered and washed with 50 ml of 33% 2-propanol in water. The product was dried resulting in 21 g of a light tan solid.

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