(2R,4R)-4-(3,4-difluoro-2-methoxyphenyl)-2-hydroxy-2-(trifluoromethyl)hexanal 、
5-amino-2H-phthalazin-1-one 在
titanium(IV) tetrabutoxide 作用下,
以to give 5-{[(2R*,4R*)-4-(3,4-difluoro-2-methoxyphenyl)-2-hydroxy-2-(trifluoromethyl)hexylidene]amino}phthalazin-1-one的产率得到5-{[(2R*,4R*)-4-(3,4-difluoro-2-methoxyphenyl)-2-hydroxy-2-(trifluoromethyl)hexylidene]amino}phthalazin-1-one