反应详情

温度

50 °C

To a solution of 3-chloro-4-hydroxyphenyl acetic acid (20 mmol) in methanol (50 mL) was added concentrated HCl solution (5 mL), and stirred for 1 h at 50° C. After excess solvents were removed under vacuum, the residue was dissolved in EtOAc (50 mL) and washed with sat. NaHCO3 solution (2×30 mL), brine (30 mL) and dried over anhydrous Na2SO4. This afforded methyl 3-chloro-4-hydroxy acetate 3 as a colorless oil (4.0 g, 99%). 1H NMR (CDCl3) 6.9-7.0 (d, 1H), 6.8-6.9 (d, 1H), 5.4 (s, 1H), 3.6 (s, 3H), 3.4 (s, 2H).

1. customAfter excess solvents were removed under vacuum
2. dissolutionthe residue was dissolved in EtOAc (50 mL)
3. washwashed with sat. NaHCO3 solution (2×30 mL), brine (30 mL)
4. dry with materialdried over anhydrous Na2SO4