反应详情

温度

140 °C

Ethenesulfonic acid (1,1,3,3-tetramethyl-butyl)-amide (10 g, 46 mmol) and 2-chloroiodoanisole (4.8 mL, 39.1 mmol) was dissolved in N,N-dimethylformamide (DMF) (75 mL). Palladium acetate (169 mg, 0.75 mmol) and triphenylphosphine (420 mg, 1.6 mmol) was added to the reaction mixture followed by triethylamine (14.7 mL, 106 mmol). The reaction was flushed with nitrogen and heated at 140° C. for 16 hours. The reaction was cooled to room temperature whereupon 1N HCl (275 mL) was added. The aqueous solution was extracted with ethyl acetate (3×225 mL) and the combined organic solution was dried over MgSO4, filtered and concentrated in vacuo to afford a solid. The solid was dissolved in dichloromethane and purified by dry flash chromatography (SiO2, heptane to 1:1 heptane: ethyl acetate). The fractions were combined to afford (E)-2-(2-chloro-phenyl)-ethenesulfonic acid (1,1,3,3-tetramethyl-butyl)-amide (4.1 g, 32% yield).

1. customThe reaction was flushed with nitrogen
2. temperatureThe reaction was cooled to room temperature whereupon 1N HCl (275 mL)
3. additionwas added
4. extractionThe aqueous solution was extracted with ethyl acetate (3×225 mL)
5. dry with materialthe combined organic solution was dried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customto afford a solid
9. custompurified
10. dry with materialby dry flash chromatography (SiO2, heptane to 1:1 heptane: ethyl acetate)