反应详情

温度

70 °C

2-Bromo-3-[4-(2-methoxybenzyloxy)-benzenesulfonyl]-6-methylpyridine from part F (75 mg, 0.167 mmol), 2-methyl-4-methoxyaniline (26 μL, 0.200 mmol), Pd(dba)3 (3 mg, 0.0033 mmol), dppp (3 mg, 0.0067 mmol), and NaOt-Bu (22 mg, 0.234 mmol) were suspended in toluene in a tightly capped conical vial. The reaction mixture was heated at 70° C. for 4.5 h. The mixture was cooled to rt, and diluted with ether. The organic layer was washed with brine (2×), dried over MgSO4, filtered, and concentrated. Purified by preparative TLC (1000 μM silica gel plate, 15% ethyl acetate in hexanes) to furnish the desired product (13 mg, 15% yield) as a pale yellow solid: mp 70–72° C.; 1H NMR (300 MHz, CDCl3) δ 8.31 (s, 1H), 7.93 (d, J=8.0 Hz, 1H), 7.77 (d, J=9.2 Hz, 2H), 7.52 (d, J=8.4 Hz, 1H), 7.30–7.22 (m, 2H), 6.96 (d, J=8.8 Hz, 2H), 6.90 (d, J=7.6 Hz, 1H), 6.84 (d, J=8.0 Hz, 1H), 6.68 (d, J=9.1 Hz, 2H), 6.53 (d, J=8.0 Hz, 1H), 5.23 (s, 2H), 3.78 (s, 3H), 3.73 (s, 3H), 2.27 (s, 3H), 2.10 (s, 3H); HRMS (ESI) m/z 505.1807 [(M+H)+, calcd for C28H29N2O5S, 505.1797].

1. temperatureThe mixture was cooled to rt
2. washThe organic layer was washed with brine (2×)
3. dry with materialdried over MgSO4
4. filtrationfiltered
5. concentrationconcentrated
6. customPurified by preparative TLC (1000 μM silica gel plate, 15% ethyl acetate in hexanes)