反应详情

To a solution of 2-bromo-5-(methoxymethoxy)pyridine (30.5 g, 140 mmol) in THF (5 mL) at 0° C. under N2 is added dichloro-((bis-diphenylphosphino)ferrocenyl)-palladium(II) (4.88 g, 5.5 mmol) followed by dropwise addition of neopentylmagnesium chloride (155 mL, 155 mmol) over 2 min. After addition, the cooling bath was removed and the reaction stirred 3 h at rt. The reaction was cooled to 0° C. and saturated NH4Cl (500 mL) was added, and the aqueous layers extracted with EtOAc (3×200 mL). The combined organic layers were washed with saturated NaCl, dried (Na2SO4) and concentrated to give a red oil. Purification by vacuum filtration through a silica plug (9×7 cm, dry load, 10-20%% EtOAc/Hexanes) gives 5-(methoxymethoxy)-2-neopentylpyridine as a light yellow oil.

1. additionAfter addition
2. customthe cooling bath was removed
3. temperatureThe reaction was cooled to 0° C.
4. additionsaturated NH4Cl (500 mL) was added
5. extractionthe aqueous layers extracted with EtOAc (3×200 mL)
6. washThe combined organic layers were washed with saturated NaCl
7. dry with materialdried (Na2SO4)
8. concentrationconcentrated
9. customto give a red oil
10. customPurification
11. filtrationby vacuum filtration through a silica plug (9×7 cm, dry load, 10-20%% EtOAc/Hexanes)