2-[4-(6-Trifluoromethyl-2-quinoxalinyloxy)phenoxy]propionic acid chloride 、
methyl 2-acetyl-4-[4-(6-fluoro-2-quinoxalinyloxy)phenoxy]-3-oxopentanoate 、
草酰氯 、
钠 、
乙酰乙酸甲酯 以to give methyl 2-acetyl-4-[4-(6-trifluoromethyl-2-quinoxalinyloxy)phenoxy]-3-oxopentanoate (XIV的产率得到methyl 2-acetyl-4-[4-(6-trifluoromethyl-2-quinoxalinyloxy)phenoxy]-3-oxopentanoate