反应详情

温度

80 °C

To a stirred solution of (E)-2-(3-iodostyryl)-1,3-dimethylbenzene (4) (0.551 g, 1.65 mmol) in NMP (10 mL) was added Et3N (0.501 g, 4.95 mmol). The resulting solution was purged with nitrogen for 2 min and tris(dibenzylideneacetone)dipalladium(0) (0.076 g, 0.083 mmol) was added followed by 1,1′-bis(diphenylphosphino)ferrocene (0.183 g, 0.330 mmol). After 0.5 h methyl thioglycolate (0.531 g, 5.00 mmol) was added and the reaction mixture was heated at 80° C. After 26 h the reaction mixture was cooled to room temperature and diluted with water (50 mL). The resulting mixture was extracted with ethyl acetate (3×50 mL) and the combined organics were dried (Na2SO4), filtered and concentrated. The residue was purified by flash column chromatography (silica gel, 90:10 hexanes/ethyl acetate) to provide (E)-2-(3-(2,6-dimethylstyryl)phenylthio)ethylamine (18) (0.473 g, 92%) as a colorless oil: 1H NMR (500 MHz, CDCl3) δ 7.54 (s, 1H), 7.34 (m, 3H), 7.12 (d, J=16.4 Hz, 1H), 7.08 (m, 3H), 6.55 (d, J=16.4 Hz, 1H), 3.73 (s, 3H), 3.69 (s, 2H), 2.36 (s, 6H).

1. customThe resulting solution was purged with nitrogen for 2 min
2. temperatureAfter 26 h the reaction mixture was cooled to room temperature
3. extractionThe resulting mixture was extracted with ethyl acetate (3×50 mL)
4. dry with materialthe combined organics were dried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified by flash column chromatography (silica gel, 90:10 hexanes/ethyl acetate)