反应详情

温度

23 °C

Haloorganic compound 15 was synthesized by a multi-step process. To a mixture of methyltriphenylphosphonium bromide (14.08 g, 39.4 mmol) in toluene at 23° C. was added a solution of potassium tert-butoxide (4.47 g, 39.8 mmol) in THF (60 mL) dropwise via cannula, and the resulting mixture was allowed to stir at 23° C. for 4 hours. The resulting yellow mixture was cooled to −78° C. and a solution of 4-iodo-salicylaldehyde (4.35 g, 17.5 mmol) in toluene (40 mL) was added dropwise via cannula. The resulting mixture was allowed to slowly warm to 23° C. and was stirred at that temperature for 12 hours. The reaction was then quenched with the addition of saturated aq. ammonium chloride (100 mL). The resulting mixture was then diluted with water (200 mL) and extracted with Et2O (3×100 mL). The combined organic fractions were then washed with brine (100 mL), dried over magnesium sulfate, and concentrated in vacuo. Purification by flash chromatography (SiO2, hexanes:ethyl acetate 7:1→1:1) yielded 2-hydroxy-5-iodostyrene as a colorless solid (4.0 g, 98%). See also Gligorich, K. M., 2006.

1. temperatureThe resulting yellow mixture was cooled to −78° C.
2. temperatureto slowly warm to 23° C.
3. stirringwas stirred at that temperature for 12 hours
4. customThe reaction was then quenched with the addition of saturated aq. ammonium chloride (100 mL)
5. additionThe resulting mixture was then diluted with water (200 mL)
6. extractionextracted with Et2O (3×100 mL)
7. washThe combined organic fractions were then washed with brine (100 mL)
8. dry with materialdried over magnesium sulfate
9. concentrationconcentrated in vacuo
10. customPurification by flash chromatography (SiO2, hexanes:ethyl acetate 7:1→1:1)