Abd El-Aal, R. M. published the artcileThe use of oxonium salts in the synthesis of mono-, β-substituted dimethine and styryl cyanine dyes, Safety of 1-Ethyl-2-methylquinolin-1-ium iodide, the publication is Dyes and Pigments (2005), 66(3), 201-209, database is CAplus.
Pyrazolopyrylium perchlorate salt derivatives were obtained from the reaction of 5-chloro-4-formyl-3-methyl-1-phenylpyrazole with methylphenylpyrazolone, 4(2-propenyl)-1,6-ene-2-cyclohexanone, and cyclohexanone. Reaction of the salts with 2(4)-Me-substituted heterocyclic quaternary salts gave the pyrazolopyrylium 4[2(4)]-monomethine cyanine dyes. Meanwhile, reaction with amide compounds gives intermediate compounds which when reacted with 2(4)-Me-substituted heterocyclic quaternary salts gave the pyrazolopyrylium 4[2(4)]-β-substituted dimethines. Reaction of the intermediate compounds with various aromatic aldehydes followed by the reaction with 2-methylquinolinium ethiodide gave bis styryl cyanine dyes. Elemental analyses and visible absorption, IR, 1H NMR, and mass spectra established the structures of these compounds The relationship between the structure and properties of these dyes is discussed.
Dyes and Pigments published new progress about 606-55-3. 606-55-3 belongs to iodides-buliding-blocks, auxiliary class Quinoline,Salt, name is 1-Ethyl-2-methylquinolin-1-ium iodide, and the molecular formula is C12H14IN, Safety of 1-Ethyl-2-methylquinolin-1-ium iodide.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com