5-((2,3-bis(4-methoxybenzyl)-1,4-dioxo-1,2,3,4-tetrahydrophthalazin-6-yl)ethynyl)-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-3',6'-diyl diacetate 在
三氟乙酸 作用下,
反应 1.0h,
以88%的产率得到5-((1,4-dioxo-1,2,3,4-tetrahydrophthalazin-6-yl)ethynyl)-2-(6-hydroxy-3-oxo-3H-xanthen-9-yl)benzoic acid