[(R)-4-(2-amino-propyl)-2,5-dimethoxy-phenyl]-acetic acid ethyl ester hydrochloride 、
N-[(R)-2-(2,5-dimethoxy-phenyl)-1-methyl-ethyl]-2,2,2-trifluoro-acetamide 、
草酰氯单乙酯 以to give the title compound in 60% yield的产率得到{2,5-dimethoxy-4-[(R)-2-(2,2,2-trifluoro-acetylamino)-propyl]-phenyl}-oxo-acetic acid ethyl ester