2-[2-[3-[2-(5-carboxy-1-ethyl-3,3-dimethylindol-1-ium-2-yl)ethenyl]-2-chlorocyclohex-2-en-1-ylidene]ethylidene]-1-ethyl-3,3-dimethylindole-5-carboxylic acid;iodide 、
4-氯苯硼酸 在
C
20H
28Cl
2N
5O
2Pd 、
potassium carbonate 作用下,
以
水 、
异丙醇 为溶剂,
反应 1.0h,
以83%的产率得到2-[2-[3-[2-(5-carboxy-1-ethyl-3,3-dimethylindol-1-ium-2-yl)ethenyl]-2-(4-chlorophenyl)cyclohex-2-en-1-ylidene]ethylidene]-1-ethyl-3,3-dimethylindole-5-carboxylic acid;iodide