3-Bromopyridine → HCID 67731667, compound

Participants

Reaction Steps

In a 1 liter 3 neck round bottomed flask was charged 20.0 g. of 4-fluorobenzyl cyanide (1.0 eq., 0.15 moles), in 300 ml. dimethylsulfoxide (DMSO) (dried over molecular sieves), and 46.8 g. of 3-bromopyridine (2.0 eq., 0.30 moles) while stirring under N2. The reaction mixture was heated to 60° C. at which time 12.4 g of KOH (1.5 eq., 0.22 moles) as powdered pellets was added neat. The reaction exotherms to 80° C. and was monitored by GLC. After 30 min., an additional 2.4 g. of potassium hydroxide (KOH) was added (0.3 eq., 0.043 moles) and 1 hr. later GLC showed 6% unreacted nitrile. The reaction was quenched by the addition of 500 ml. of water and then extracted with 1 liter of ether. The organic phase was washed 3 times 250 ml. H2O, dried over MgSO4 and concentrated to give 50 g. of oil. The crude product was distilled under vacuum to give 15.7 g. of oil (49.4% yield) bp 160°-170° C. @1-2 min. Hg.

Provenance & Evidence