pyrrole

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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

(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.

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.
References in periodicals archive ?
Of the insecticides tested, the spinosyns (spinetoram, spinosad) and the pyrrole chlorfenapyr were the most effective against both thrips species with [LD.sub.50] values below 1 [micro]g per mL for both species.
Pyrrole (Py), 3,4-ethylenedioxythiophene (EDOT), [beta]-galactosidase ([beta]-Gal, EC 3.23.1.23, [greater than or equal to] 8000 units/g, from Aspergillus oryzae) and galactose oxidase (GaOx, EC 1.1.3.4, 179000 units/g, type VII-S from Dactylium dendroides) were purchased from Sigma-Aldrich.
The CrA oxidation seemed to preferentially break down pyridine and N-bonded aromatics but had no effect on pyrroles. Pyridines were sensitive to oxidative treatment by PO but N-bonded aromatics were not.
Pyrroles. Chlorfenapyr is the only approved pyrrole for use.
Bull, "Friedel--Crafts acylation of pyrroles and indoles using 1, 5- diazabicyclo[4.3.0]non-5-ene (DBN) as a nucleophilic catalyst," Organic Letters, vol.
The gas phase ligand molecule of tetramic acid (Figure 4(a)) is not planar as the calculated dihedral angle between the phenyl and pyrrole ring is about 31[degrees], in accordance with the crystalline structure where there is a twist of 27.42 (8)[degrees] between the mean planes of the two rings.
Chlorfenapyr is a member of a new class of chemicals, namely, pyrroles (chemical name: 4-bromo-2-(4-chlorophenyl)-1-(ethoxymethyl)-5-(trifluoromethyl)- 1H-pyrrole-3carbonitrile; trade name: Pylon miticide-insecticide).
This eventually produces many important classes of flavour compounds including furans, pyrazines, pyrroles, oxazoles, thiophenes, thiazoles and other heterocyclic compounds (Figure 5; Melton, 1999).
The topics include chiral non-racemic isocyanides, Ugi and Passerine reactions with carboxylic acid surrogates, multiple multi-component reactions with isocyanides, the synthesis of pyrroles and their derivatives from isocyanides, and carbene complexes derived from metal-bound isocyanides.
Al ser ampliamente utilizados en la agricultura y la horticultura, algunas especies han desarrollado resistencia a estas sustancias, lo que ha llevado a sintetizar nuevos compuestos quimicos, entre los que se encuentran los clasificados como pyrroles (7).
Her current research interests include the synthesis and applications of dipyrromethene complexes, the development of new methodology for the efficient synthesis of functionalized pyrroles, and the design and synthesis of prodigiosins for the evaluation against breast cancer.