反应详情

To a solution of methyl 2-bromonicotinate (5.6 g, 25.9 mmol) in toluene (140 mL) was added 4-chlorophenylboronic acid (6.1 g, 38.9 mmol), potassium carbonate (5.4 g, 39 mmol), and tetrakis(triphenylphosphine) palladium (1.53 g. 1.3 mmol). The mixture was heated to reflux for 3.5 hours, evaporated in vacuo and then purified on a silica gel column using a 1:4 mixture of ethyl acetate:hexane as mobile phase. Pure fractions were combined and the solvent was removed in vacuo to yield methyl 2-(4-chlorophenyl)nicotinate (6.0 g, HPLC RT=3.04 min, method A; LC-MS m/z=248).

1. temperatureThe mixture was heated
2. temperatureto reflux for 3.5 hours
3. customevaporated in vacuo
4. custompurified on a silica gel column
5. additiona 1:4 mixture of ethyl acetate
6. customthe solvent was removed in vacuo