乙基 2-(4-氨基-2-氟苯氧基)乙酸甲酯

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A solution of (2-fluoro-4-nitro-phenoxy)-acetic acid ethyl ester (17.0 g, 55.92 mmol) in EtOH (330 ml) and aqueous 1M HCl (55.92 ml, 55.92 mmol) was hydrogenated in the presence of 10% Pd/C (1.7 g) for 2 days. After removal of the catalyst the reaction was evaporated and treated with water/Et2O (3×), the aqueous phase was treated with NaHCO3 and extracted with Et2O (3×). The organic phases were washed with aqueous 10% NaCl, dried (Na2SO4) and evaporated to give 5.39 g (45%) of (4-amino-2-fluoro-phenoxy)-acetic acid ethyl ester as a brown crystallin residue, MS: 213 (M+). After removal of the catalyst the reaction was evaporated treated with water/Et2O (3×) the aqueous phase was treated with NaHCO3 extracted with Et2O (3×) The organic phases were washed with aqueous 10% NaCl dried (Na2SO4) evaporated