pyrrole

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Related to pyrrolic: pyridine

pyrrole

 [pir´ōl]
a basic, cyclic substance, obtained by destructive distillation of various animal substances.

pyr·role

(pir'ōl),
Divinylenimine; a heterocyclic compound found in many biologically important substances, for example, heme.
Synonym(s): azole, imidole

pyrrole

/pyr·role/ (pir´ōl)
1. a toxic, basic, heterocyclic compound; obtained by destructive distillation of various animal substances and used in the manufacture of pharmaceuticals. Pyrrole.
2. a substituted derivative of this structure.

pyrrole

(pîr′ōl′)
n.
1. A five-membered heterocyclic ring compound, C4H5N, having an odor similar to chloroform, that is the parent compound of protoporphyrin.
2. Any of various derivatives of this compound.

pyr·ro′lic (pĭ-rō′lĭk) adj.

pyrrole (C4H4NH)

[pirōl′, pir′ōl]
Etymology: Gk, pyrrhos, red
a five-membered heterocyclic aromatic substance occurring naturally in many compounds in the body. Heme and porphyrin are pyrrole derivatives.

pyr·role

(pir'ōl)
A heterocyclic compound found in many biologically important substances.
Synonym(s): azole, imidole.

pyrrole

a porphyrin building block that has a five-membered heterocyclic structure and contains nitrogen.

pyrrole

a basic, cyclic substance, obtained by destructive distillation of various animal substances. Critical components in the synthesis of porphyrins.
References in periodicals archive ?
a] for the cleavage of the C-N bond (pathways P3 and P4) in the pyrrolic ring is about 416 kJ/mol, being lower than that for the cleavage of the C-C bond at position [gamma].
Indole is another type of pyrrolic nitrogen in oil shale kerogen.
When it comes to the decomposition of the pyrrolic ring (pathways P8 and P9), the C-N bond far from the aromatic ring is the weakest in the pyrrolic ring, the direct crack of which has the [E.
The hydrazide derivative was obtained from a BODIPY precursor containing an ethyl ester, which was obtained from the reaction of a 2-pyrrole carbaldehyde and another pyrrolic unit with an ethyl ester functionality.
An approach employed in other studies involved the use of bromohexyl benzaldehyde in a reaction with a pyrrolic derivative.
X-ray photoelectron spectroscopy (XPS) [9-13] and X-ray absorption near edge spectroscopy (XANES) [14-16] showed that pyrrolic and pyridine forms were the major nitrogen functionalities present in raw coals.
These forms included pyridine, amino, pyrrolic and quaternary nitrogen functionalities, which corresponded to fit peaks at 398.
The decrease in the relative amounts of pyridone functionality cannot be interpreted as a partial conversion of pyrrolic into pyridine, because carbazole (N-5) remains unaffected after pyrolysis at 600 [degrees]C for 1 h [19].