iodomethyl isopropylcarbamate 、
(S)-((4,11-diethyl-4-hydroxy-3,14-dioxo-3,4,12,14-tetrahydro-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinolin-9-yl)oxy)methyl nicotinate 以
二氯甲烷 为溶剂,
反应 16.0h,
以85%的产率得到(S)-3-((((4,11-diethyl-4-hydroxy-3,14-dioxo-3,4,12,14-tetrahydro-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinolin-9-yl)oxy)methoxy)carbonyl)-1-(((isopropylcarbamoyl)oxy)methyl)pyridin-1-ium iodide