2,3,3-trimethyl-4,5-benzoindolenine methiodide 、
(9-N-methylanilino-3,7-dimethyl-2,4,6,8-nonatetraenylidene)-N-methylanilinium chloride 在
sodium acetate 作用下,
以
乙醇 为溶剂,
以34%的产率得到2-{(1E,3E,5E,7E,9E)-4,8-Dimethyl-11-[1,1,3-trimethyl-1,3-dihydro-benzo[e]indol-(2E)-ylidene]-undeca-1,3,5,7,9-pentaenyl}-1,1,3-trimethyl-1H-benzo[e]indolium; iodide