反应详情

A mixture of methyl 3-[(acetyloxy)methyl]-4-bromobenzoate obtained in step 2 (4.7 g; 16.4 mmol), o-tolylboronic acid (2.45 g; 18 mmol), potassium carbonate (11.3 g; 82 mmol) and Pd(PPh3)4 (1.89 g; 1.64 mmol) in toluene (23.5 mL) and water (23.5 mL) was refluxed for 2 hours. After cooling to RT, the reaction mixture was filtered through a pad of Celite® which was further washed with toluene (50 mL). The filtrate was concentrated in vacuo, the residue taken up in EtOAc (250 mL) and washed with sat. aq. NaHCO3, water and brine, dried over magnesium sulphate and concentrated in vacuo to afford the title compound (4.9 g, quantitative) as a brown oil. HPLC (Method A) Rt 5.23 min (Purity 62.3%).

1. temperaturewas refluxed for 2 hours
2. filtrationthe reaction mixture was filtered through a pad of Celite® which
3. washwas further washed with toluene (50 mL)
4. concentrationThe filtrate was concentrated in vacuo
5. washwashed with sat. aq. NaHCO3, water and brine
6. dry with materialdried over magnesium sulphate
7. concentrationconcentrated in vacuo