id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
eurjchem-699	Gomaa, Maha Mobaruk; El-Deen, Naglaa Salah; El-Kanzi, Nadia Ali	Benzo[g]quinoline heterocyclic derivative as a typical precursor in the synthesis of new class of cyanine-like dyes	2012	7	.pdf	application/pdf	3969	182	55	Synthesis of 4‐amino‐5,10‐dioxo‐1,5,10,11‐tetrahydro‐ benzo[g]quinoline‐3‐carbonitrile‐merocyanine‐2(4)mono‐ methine cyanine‐ like dye (2a), 4‐amino‐5,10‐dioxo‐1,5,10, 11‐tetrahydro‐benzo[g]quinoline‐3‐carbonitrile‐mero‐ cyanine‐2(4)monomethine cyanine‐like dye (2b), 4‐amino‐ 5,10‐dioxo‐1,5,10,11‐tetrahydro‐benzo[g]quinoline‐3‐carbo nitrile‐merocyanine‐2(1)monomethine cyanine‐ like dye (2c) An ethanolic solution of equimolar amount of compound 1 and 1‐ethyl(pyridinium, quinolinium and/or isoquinolinium) salts (0.01 mol) were refluxed for 7‐8 hr, in the presence of piperidine (3‐5 drops), filtered hot, concentrated and acidified with acetic acid. On the other hand, reaction of compound 1 with active methyl heterocyclic quaternary salts (α()‐picolines and/or quinaldine)ethyl iodide gave the corresponding 4‐amino‐2‐ methyl‐5,10‐dioxo‐1,5,10,11‐tetra‐hydrobenzo[g]quinolin‐ meso‐substituted‐3[2(4)] dimethine cyanine‐like dyes 2a‐c (Scheme 1).	cache/eurjchem-699.pdf	txt/eurjchem-699.txt