O-(N-succinimidyl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、
5-(4-carboxyphenyl)-9,9,11-trimethyl-4,6-dioxo-5,6,8,9,10,11-hexahydro-4H-isoquino[4,5-g,h]quinazolin-9-ium chloride 在
N,N-二异丙基乙胺 作用下,
以
乙腈 为溶剂,
反应 2.0h,
以100%的产率得到5-[4-(2,5-dioxotetrahydro-1H-1-pyrrolyloxycarbonyl)phenyl]-9,9,11-trimethyl-4,6-dioxo-5,6,8,9,10,11-hexahydro-4H-isoquino[4,5-gh]quinazolin-9-ium chloride