反应详情

温度

0 °C

Sodium methoxide (0.27 g, 0.5 mmol) was added to 1 M solution of lithium aluminum hydride in tetrahydrofuran (12 mL, 12 mmol). The mixture was cooled to 0° C. and a solution of 3-(4-bromophenyl)prop-2-yn-1-ol (0.422 g, 2.0 mmol) in tetrahydrofuran (50 mL) was slowly added. The reaction was stirred for at 0° C. for 3 h, ethyl acetate (2.6 mL, 30 mmol) was added and the mixture was stirred for further 10 min without cooling. Iodobenzene (2.7 g, 13 mmol), anhydrous zinc bromide (1.4 g, 6 mmol), and tris(dibenzylideneacetone)dipalladium chloroform complex (0.50 g, 0.5 mmol) were added and the mixture was evacuated and kept under nitrogen. A solution of tri-tert-butylphosphine in cyclohexane (6.7 mL, 1 mmol) was added and the mixture was heated at 60° C. for 16 h. Methanol (10 mL) was added and the resulting mixture was stirred for additional 1 h. The reaction mixture was poured into water, acidified with hydrochloric acid and extracted with ethyl acetate (3×100 mL). Organic layers were combined, dried with anhydrous sodium sulphate, evaporated in vacuo and the residue was purified by column chromatography (silica gel Fluka 60, hexanes/ethyl acetate 98:2-70:30) affording (E)-3-(4-bromophenyl)-3-phenylprop-2-en-1-ol.

1. stirringthe mixture was stirred for further 10 min
2. temperaturewithout cooling
3. customthe mixture was evacuated
4. temperaturethe mixture was heated at 60° C. for 16 h
5. stirringthe resulting mixture was stirred for additional 1 h
6. extractionextracted with ethyl acetate (3×100 mL)
7. dry with materialdried with anhydrous sodium sulphate
8. customevaporated in vacuo
9. customthe residue was purified by column chromatography (silica gel Fluka 60, hexanes/ethyl acetate 98:2-70:30)