7-isopropyl-2,2-dimethyl-4-oxo-5-phenylchroman-6-carbaldehyde 、 7-n-propyl-2,2-dimethyl-4-oxo-5-phenylchroman-6-carbaldehyde 、 (4-(trifluoromethoxy)phenyl)magnesium bromide 在
水 、
碳酸氢钠 作用下,
以
四氢呋喃 为溶剂,
以52%的产率得到rac-6-{Hydroxy[4-(trifluoromethoxy)phenyl]methyl}-7-isopropyl-2,2-dimethyl-5-phenyl-2,3-di-hydro-4H-chromen-4-one