2-[2-[2-Diazonioimino-3-[2-(1-ethyl-3,3-dimethylindol-2-ylidene)ethylidene]cyclohexylidene]ethylidene]-1-ethyl-3,3-dimethylindole 在
sodium hydrogen sulfide 作用下,
以
乙腈 为溶剂,
反应 0.33h,
以95%的产率得到2-[2-(1-Ethyl-3,3-dimethylindol-1-ium-2-yl)ethenyl]-6-[2-(1-ethyl-3,3-dimethylindol-2-ylidene)ethylidene]cyclohexen-1-amine