N-[2-[2-[3-[2-(5-acetamido-1-ethyl-3,3-dimethylindol-1-ium-2-yl)ethenyl]-2-chlorocyclohex-2-en-1-ylidene]ethylidene]-1-ethyl-3,3-dimethylindol-5-yl]acetamide;iodide 在
boron trifluoride methanol complex 作用下,
以
甲醇 为溶剂,
反应 5.0h,
以95%的产率得到5-Amino-2-((E)-2-{3-[2-[5-amino-1-ethyl-3,3-dimethyl-1,3-dihydro-indol-(2E)-ylidene]-eth-(E)-ylidene]-2-chloro-cyclohex-1-enyl}-vinyl)-1-ethyl-3,3-dimethyl-3H-indolium; iodide