3-trimethyl-2H-indole-2-ylidene)ethylidene]-1-cyclohexane Preparation of en-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 and an infrared absorber. there are reports in the literature 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 can be used to prepare a product with good resistance to solvents and print room chemicals performance of positive-image infrared sensitive compositions. apply[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 used to prepare a positive-pattern…