反应详情

To a solution of (dipyridin-3-ylmethyl)amine (139 mg, 0.75 mmol) (prepared according to the procedure in German patent DE 2447258 (1976)) and 4-(3-chloropyridin-2-yl)-3,4-dihydro-2H-1,4-benzoxazine (183 mg, 0.75 mmol) in dry dioxane (1.5 mL) was added sodium t-butoxide (91 mg, 0.95 mmol), bis(tri-t-butylphosphine)palladium(0) (30 mg, 0.058 mmol). The vessel was sealed with a septum cap, degassed (3×), and heated at 100 C for 8 hours. The reaction was cooled and diluted with methylene chloride and washed with NaHCO3 solution. The organic layer was dried over anhydrous sodium sulfate, filtered, and the solvent evaporated. The residue was purified by chromatography on silica gel eluting with a 20-90% acetone/hexane gradient to the title compound as a clear glass. 1H-NMR (500 MHz, CDCl3): δ 8.60 (2H, s), 8.56 (2H, d, J=4.4 Hz), 7.91 (1H, d, J=4.6 Hz), 7.54 (1H, d, J=7.8 Hz), 7.26 (1H, t, J=7.5 Hz), 6.97 (1H, dd, J=4.6, 7.8 Hz), 6.87 (1H, d, J=7.8 Hz), 6.77-6.81 (3H, m), 6.37 (1H, d, J=7.6 Hz); 5.57 (1H, d, J=4.4 Hz), 4.77 (1H, d, J=4.1 Hz), 4.40 (2H, t, J=4.4 Hz), 3.76 (2H, br s). m/e (m+1): 396.2

1. customThe vessel was sealed with a septum
2. customcap
3. customdegassed (3×)
4. temperatureheated at 100 C for 8 hours
5. temperatureThe reaction was cooled
6. additiondiluted with methylene chloride
7. washwashed with NaHCO3 solution
8. dry with materialThe organic layer was dried over anhydrous sodium sulfate
9. filtrationfiltered
10. customthe solvent evaporated
11. customThe residue was purified by chromatography on silica gel eluting with a 20-90% acetone/hexane gradient to the title compound as a clear glass