4-(azetidin-1-yl)-6'-fluoro-4-(thiophen-2-yl)-4',9'-dihydro-3'H-spiro[cyclohexane-1,1'-pyrano[3,4-b]indole] 、
柠檬酸 以
异丙醇 为溶剂,
反应 16.0h,
以78%的产率得到4-(azetidin-1-yl)-6'-fluoro-4-(thiophen-2-yl)-4',9'-dihydro-3'H-spiro[cyclohexane-1,1'-pyrano[3,4-b]indole] 2-hydroxypropane-1,2,3-tricarboxylate