反应详情

Tetrakis-(triphenylphosphine)palladium (153 mG; 0.135 mM) was added to a stirred solution of 3-bromopyridine (0.434 mL; 4.5 mM) in 9 mL of toluene. The resulting solution was stirred 10 mins. under nitrogen at R.T. 2M aqueous sodium carbonate solution (5 mL; 10 mM) followed by a solution of 3-bromophenylboronic acid (1 G; 5 mM) in 2.5 mL of absolute ethanol were added. This heterogeneous reaction mixture was vigorously stirred 20 hrs. at 80° under nitrogen, cooled, diluted with 25 mL of methylene chloride, and washed with 2×5 mL of 2M aqueous sodium carbonate solution containing 0.5 mL of conc. ammonia. The organic layer was dried over anhyd. magnesium sulfate. Solvent removal followed by purification on silica gel using ether:petroleum ether (1:1) as solvent gave 3-(3'-bromophenyl)pyridine in 35% yield as a colorless liquid boiling at 140°-2°/~2 mm.

1. customat R.T
2. additionwere added
3. waitThis heterogeneous reaction mixture was vigorously stirred 20 hrs
4. temperatureat 80° under nitrogen, cooled
5. washwashed with 2×5 mL of 2M aqueous sodium carbonate solution
6. additioncontaining 0.5 mL of conc. ammonia
7. customThe organic layer was dried over anhyd
8. customSolvent removal
9. customfollowed by purification on silica gel