heterocyclic compound

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heterocyclic compound

[‚hed·ə·rō′sī·klik ¦käm‚pau̇nd]
(organic chemistry)
Compound in which the ring structure is a combination of more than one kind of atom; for example, pyridine, C5H5N.
References in periodicals archive ?
In view of these important properties, we decided both to prove reproducibility of the reaction of 4-benzoyl-1,5-diphenyl-1H-pyrazole-3-carboxylic acid chloride (1a) with some thiol, amino acid and diamine derivatives and to extend our investigations related to preparing new heterocycles, which include the pyrazole ring in their structures.
Also, from the value of [DELTA][omega] heterocycle 1d could involve in (4+2) addition reactions with heterocycles 1e and 1f.
The influence of the spacer length and the heterocycle is evaluated and the synthesis of bifunctional onium salts is optimized with those results.
Cumming and his team at Merck have now designed an additional imino heterocycle scaffold and in parallel have worked to further optimize binding interactions in sub-sites adjacent to the catalytic dyad.
The recently registered substance is a novel arylmethylidene heterocycle with analgesic properties.
PPG Industries has received a patent for a crosslinking agent comprised of an ungelled reaction product of the following reactants: at least one aminoplast resin; and at least one aromatic heterocycle containing at least one ring nitrogen atom with an active hydrogen attached thereto; wherein the crosslinking agent has a glass transition temperature of at least 10[degrees]C and is substantially free of active hydrogen-containing groups and wherein the aromatic heterocycle is comprised of at least 10% weight of the weight of reactants.
The gluability of the resultant copolymer resins were then evaluated by bonding Moso bamboo (Phyllostachys heterocycle Milf, Phyllostachys pubescens Mazel ex H.
As continuate our work on the find drug lead compounds[20-23], the title two compound (3 - (((5 - (pyridin-4-yl) - 1, 3, 4-thiadiazol-2-yl) thio) methyl) benzonitrile and 2 - ((4 - (tert-butyl) benzyl) thio) - 5 - (pyridin-4-yl) - 1, 3, 4 - thiadiazole) were designed by link pyridine and 1,3,4-thiadiazole heterocycle.
A fused system, however, incorporates the heterocycle directly, ensuring conjugation.
Up to now, the Friedel-Crafts reaction of an electron rich aromatic heterocycle with activated carbonyl compounds mainly include indoles with ethyl trifluoropyruvate [11-17], 2-oxomalonate [18-21] and other a-ketoesters [22].
The editors have organized the contributions that make up the main body of the text in ten chapters devoted to carbon-heteroatom bond-forming reactions and heterocycle synthesis under ball milling, carbon-carbon bond forming by ball milling, cross dehydrogenative coupling reactions by ball milling, and a wide variety of other related subjects.