反应详情

Diiodomethane (24.8 ml, 308 mmol) was added dropwise to a solution of diethylzinc (200 ml, 220 mmol) 1.1 M in toluene at 0° C. After the addition, the solution was stirred at RT for 40 minutes and then recooled to 0° C. when 5-(methoxymethoxy)-2-(2-methylprop-1-enyl)pyridine (21.3 g, 110 mmol) in toluene (150 mL) was added dropwise through an addition funnel. The reaction was allowed to come to RT and was stirred 12 hrs before being quenched at 0° C. by the addition of a 10:1 saturated ammonium chloride/ammonium hydroxide aqueous solution. The layers were separated and the aqueous layer was diluted with water and extracted into ethyl acetate. The combined organic layers were washed with 10:1 saturated ammonium chloride/ammonium hydroxide aqueous solution, water, brine, dried over sodium sulfate, and concentrated. The crude product was purified through a plug of silica (10:1 Hexanes/EtOAc) to afford the titled compound. MS m/z: 208.2 (100%, M+1).

1. additionAfter the addition
2. customrecooled to 0° C.
3. additionwas added dropwise through an addition funnel
4. customto come to RT
5. stirringwas stirred 12 hrs
6. custombefore being quenched at 0° C. by the addition of a 10:1 saturated ammonium chloride/ammonium hydroxide aqueous solution
7. customThe layers were separated
8. additionthe aqueous layer was diluted with water
9. extractionextracted into ethyl acetate
10. washThe combined organic layers were washed with 10:1 saturated ammonium chloride/ammonium hydroxide aqueous solution, water, brine
11. dry with materialdried over sodium sulfate
12. concentrationconcentrated
13. customThe crude product was purified through a plug of silica (10:1 Hexanes/EtOAc)