反应详情

To a stirring, argon-purged solution of 4-picolyl chloride-HCl (15 g, 91.4 mmol) and N-methylformamide (53.4 ml, 914 mmol) in 300 ml of THF at room temperature was added portionwise over a 20 minute period a suspension of 80% NaH (5.48 g, 183 mmol). The reaction was quenched 18 h later by the addition of ice, partitioned between methylene chloride and water, washed with water and brine, dried over MgSO4, and evaporated to dryness to afford a dark oil. Flash chromatography on silica gel provided 10.5 g (76%) of the titled compounds a pale yellow oil. TLC; silica gel (9:1 CHCl/MeOH) Rf=0.54.

1. additionwas added portionwise over a 20 minute period
2. customThe reaction was quenched 18 h later by the addition of ice
3. custompartitioned between methylene chloride and water
4. washwashed with water and brine
5. dry with materialdried over MgSO4
6. customevaporated to dryness
7. customto afford a dark oil