sodium 3-(11-(3-carboxypropyl)-10,10-dimethyl-8-(sulfonatomethyl)-2,3,4,8,9,10-hexahydro-1H-dipyrido[3,2-b:2',3'-i]phenoxazin-11-ium-1-yl)propane-1-sulfonate 、 O-(N-succinimidyl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、
N,N-二异丙基乙胺 以
N,N-二甲基甲酰胺 为溶剂,
反应 2.0h,
以94%的产率得到ethyl-diisopropyl-ammonium 3-(11-(4-(2,5-dioxopyrrolidin-1-yloxy)-4-oxobutyl)-10,10-dimethyl-8-(sulfonatomethyl)-2,3,4,8,9,10-hexahydro-1H-dipyrido[3,2-b:2',3'-i]phenoxazin-11-ium-1-yl)propane-1-sulfonate