3-trimethyl-2H-indole-2-ylidene)ethylidene]-1-cyclohexane Preparation of alken-1-yl]vinyl]-1

Background and overview[1] 2-[2-[2-Chloro-3-[(1,3-dihydro-1,3,3-trimethyl-2H-indole-2-ylidene)ethylene]-1 -Cyclohexen-1-yl]vinyl]-1,3,3-trimethyl-3H-indole 4-methylbenzenesulfonate is a cyanine dye an…