反应详情

温度

80 °C

A mixture of 2.26 g (5.64 mmol) of 2,4,6-trimethyl-N-{[1-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-naphthyl]methyl}aniline, 2.11 g (6.00 mmol) of N-[1-(6-bromopyridin-2-yl)-1-methylethyl]-2,6-diisopropylaniline, 4.03 g (14.1 mmol) of Na2CO3×10H2O, 63 ml of water, 18 ml of methanol, and 76 ml of toluene was purged with argon for 30 min. To the obtained solution 0.32 g (0.30 mmol) of Pd(PPh3)4 was added. In argon atmosphere, this mixture was stirred for 12 h at 80° C., then cooled to room temperature. The organic layer was separated, the aqueous layer was extracted with 3×200 ml of ethyl acetate. The combined organic extract was washed with brine, dried over Na2SO4 and evaporated to dryness. The crude product was purified by flash chromatography on silica gel 60 (40-63 um, eluent: dichloromethane-ethyl acetate=20:1, vol.). Yield 2.60 g (81%) of yellow oil. Anal. calc. for C40H47N3: C, 84.31; H, 8.31; N, 7.37. Found: C, 84.50; H, 8.51; N, 7.22. 1H NMR (CDCl3): δ 7.88 (m, 1H, 8-H in naphtalene), 7.85 (d, J=8.4 Hz, 1H, 4-H in naphtalene), 7.80 (t, J=7.7 Hz, 1H, 4-H in pyridine), 7.67 (dd, J=7.7 Hz, J=0.6 Hz, 1H, 5-H in naphtalene), 7.37-7.49 (m, 4H, 3, 5, 6, 7-H in naphtalene), 7.24 (dd, J=7.7 Hz, J=0.6 Hz, 1H, 3-H in pyridine), 7.04-7.06 (m, 3H, 3, 4, 5-H in 2, 6-iPr2C6H3), 6.76 (s, 2H, 3, 5-H in mesityl), 4.14 (br.s, 1H, NH), 4.00 (m, 2H, CH2N), 3.48 (br.s, 1H, NH), 3.23 (sep, J=6.7 Hz, 2H, CHMe2), 2.22 (s, 3H, 4-Me in mesityl), 2.06 (s, 6H, 2, 6-Me in mesityl), 1.57 (s, 3H, CMeMe′), 1.45 (s, 3H, CMeMe′), 1.04 (d, J=6.7 Hz, 6H, CHMe2), 1.02 (d, J=6.7 Hz, 6H, CHMe2).

1. customwas purged with argon for 30 min
2. temperaturecooled to room temperature
3. customThe organic layer was separated
4. extractionthe aqueous layer was extracted with 3×200 ml of ethyl acetate
5. extractionThe combined organic extract
6. washwas washed with brine
7. dry with materialdried over Na2SO4
8. customevaporated to dryness
9. customThe crude product was purified by flash chromatography on silica gel 60 (40-63 um, eluent: dichloromethane-ethyl acetate=20:1, vol.)