ChemInform Abstract: Synthesis and Studies on Some Heterocyclic Nitrogen Compounds.

Sucesseful Approache for the Synthesis of Newly Fused Heterocyclic Compounds Incorborating Phenylperinaphthenone and Naphrydine Derivatives

“…The structure of these compound derivatives were established by elemental analysis, 1 Η NMR, LR, and Mass spectral data (Tables 1, 2). The structures of these compounds were confirmed by elemental analysis; 1R; 'H NMR and mass pectral data ( Table 1, 2). The later then aromatize by ethyl formate elimination affording 5.…”

“…The application of the substituted heteroaromatic compounds in various aspects is beyond estimation, and there are always continuos need for the discovery of new heterocyclic compounds in order to satisfy the great demand for these compounds in industrial and various biological fields 1,2 Within this respect, our initial strategy to the synthesis of newly fused phenylperinaphthenone (8) derivatives 6a-d (Scheme-1) is planed according to the cycloaddition reaction between 3-cyano-4-methyl-6-oxo-5-phenylhydrazono-2pyridinyl-malononitrile 1 with a, ß-unsaturated rutrile derivatives 2a-d. Our conception to the obvious cycloaddition reaction that it leads to the formation of pyrido [3,4-c]pyridazine derivative 7. But the experimental evidence that depends on the different types of analysis of the reaction product, proofs that the cycloaddition reaction leads to the formation of phenylperinaphthenone(S) derivatives 6a-d. (Table 1).…”

Synthesis of Different Classes of Polyheterocyclic Cyanine Dyes: a Review

“…Dimethine cyanines (28a-f) and their bases (29a, b), incorporating pyrazolo (3,4-d)-8-amino-1-azaquinoxaline moiety or its ethiodide, have been prepared (El-Maghraby, et al, 1988), Scheme (4). (Khalafalla et al, 1993), Scheme (6). (6) A number of mono-(tri-)-methine and aza-methine cyanine dyes of pyrazolo [5,4-b] quinolino[a,b]-1,4-pyra-(oxa)-zinium bromide salts were prepared (Koraiem et al, 1999), Scheme (7).…”

Benzo[g]quinoline heterocyclic derivative as a typical precursor in the synthesis of new class of cyanine-like dyes

“…Also a large number of chemicals derived from quinone as the basic subunit exhibit prominent pharmacological applications such as antimalarial [5] and herbicidal activity [6]. On the other hand, cyanine dyes have been extensively studied over the past century, mainly as photosensitizes for photography [7,8]. In recent decades, other applications such as optical recording and storage media [9,10], visible and near-infrared laser dyes [10][11][12], biological fluorescent stains and probes [13] cyanine dyes find extensive application as photo sensitizers in the blue green light [14].…”