diethyl-2-(2-(ethoxycarbonyl)-3-hydroxy-4-oxo-7,8,10,11-tetrahydro-4H-7,11-methanopyrimido[1,2-a][1,5]diazocin-9(6H)-yl)-2-butenedioate 在
三氟乙酸 作用下,
以
乙腈 为溶剂,
反应 6.0h,
以90%的产率得到ethyl 3-hydroxy-4-oxo-6,7,8,9,10,11-hexahydro-4H-7,11-methanopyrimido[1,2-a][1,5]diazocine-2-carboxylate trifluoroacetate