反应详情

温度

80 °C

To a Schlenk tube charged with a solution of 200 mg (1.0 mmol) of 2-acetyl-6-bromopyridine and 23 mg (0.02 mmol) of (Ph3P)4Pd in 10 mL of degassed toluene was added a solution of 150 mg (1.2 mmol) phenylboronic acid and 270 mg (2.5 mmol) Na2CO3 in 8 mL of degassed 4:1 H2O/MeOH. The biphasic mixture was heated to 80° C. with rapid stirring for 1 h. On cooling to RT, Et2O (50 mL) was added and the layers were separated. The organic layer was dried over Na2SO4 and the volatiles were removed by rotary evaporation. The resulting oil was chromatographed on silica with 10-50% CH2Cl2/hexanes eluent to provide 176 mg (89%) of 2-acetyl-6-phenylpyridine as a white powder. 1H NMR (CDCl3); δ 2.84 (s, 3H); 7.43-7.62 (m, 3 H); 7.91-8.08 (m, 3 H); 8.18 (d, J=6.6 Hz, 2H). Mass Spec.: m/e 197.

1. customof degassed 4:1 H2O/MeOH
2. temperatureOn cooling to RT
3. additionEt2O (50 mL) was added
4. customthe layers were separated
5. dry with materialThe organic layer was dried over Na2SO4
6. customthe volatiles were removed by rotary evaporation
7. customThe resulting oil was chromatographed on silica with 10-50% CH2Cl2/hexanes eluent