多巴胺杂质43

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

实验步骤: 4-(3-Aminobutyl)phenol (510 mg, 3.087 mmol) and triethylamine (1.3 ml, 9.26 mmol) were dissolved in 30 ml of ethyl acetate. At 0° C., acetic anhydride (029 ml, 3.087 mmol) was added. The cooling bath was removed after 1 h. The reaction mixture was concentrated, and the residue was purified by preparative HPLC (PR18, acetonitrile/water 0.1% TFA). Yield: 472 mg (74%) of N-[3-(4-hydroxyphenyl)-1-methylpropyl]acetamide, M+H+: 208.14 and 54 mg (7%) of 4-(3-acetylaminobutyl)phenyl acetate, M+H+: 250.13. The cooling bath was removed after 1 h The reaction mixture was concentrated the residue was purified by preparative HPLC (PR18, acetonitrile/water 0.1% TFA)