تفاعل #1605774

معادلة التفاعل

2-bromo-5-methylpyridine

acetonitrile

n-BuLi

→

2-(5-methylpyridin-2-yl)acetonitrile

المذيبات

THF

THF

ظروف التفاعل

المعالجة

1. 1
   workup.WAITThe reaction mixture was kept at −78° C. for 1 hr
2. 2
   درجة الحرارةthen warmed up slowly
3. 3
   workup.STIRRINGstirred for another 1 hr
4. 4
   أخرىthe layer was separated
5. 5
   غسيلThe organic layer was washed with water and brine
6. 6
   تجفيفdried over MgSO4
7. 7
   ترشيحfiltered
8. 8
   أخرىevaporated

الإجراء التجريبي

To a solution of anhydrous acetonitrile (10.1 mL, 191.83 mmol, 3.3 eq) in dry THF (500 mL) was added dropwise n-BuLi (2.5 M in Hexane, 69.8 mL, 174.39 mmol, 3 eq) at −78° C. under N2 atmosphere. The resulting white suspension was stirred at −78° C. for 1 hr, and then a solution of 2-bromo-5-methylpyridine (10.0 g, 58.13 mmol, 1 eq) in dry THF (30 mL) was added. The reaction mixture was kept at −78° C. for 1 hr then warmed up slowly to r.t and stirred for another 1 hr. Ice/water was added and the layer was separated. The organic layer was washed with water and brine, dried over MgSO4, filtered and evaporated to give 18 g of crude 2-(5-methylpyridin-2-yl)acetonitrile. Since the product is very volatile, it was not dried under high vacuum and still contains some solvent.

المصدر