Results 251 to 260 of about 17,074 (296)

A novel pyrrole synthesis

Org. Biomol. Chem., 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Sameer, Agarwal, Hans-Joachim, Knolker
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The System Pyridine-Pyrrole and the Association of Pyrrole

The Journal of Chemical Physics, 1955
Pyridine and pyrrole react together to form a 1:1 complex as shown by infrared, heat of reaction, viscosity, refractive index, and density data. The heat of formation of this complex is 3.8 kcal/mole. Pyrrole itself is associated, but, like the simple alcohols, cannot be represented by a simple equilibrium.
Serge N. Vinogradov, Robert H. Linnell
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Pyrrole carboxamide introduction in the total synthesis of pyrrole–imidazole alkaloids

Organic & Biomolecular Chemistry, 2021
The pyrrole carboxamide is a characteristic structural feature found in the pyrrole–imidazole (oroidin) alkaloids, the various traditional and non-tradition methods for its introduction are reviewed herein.
Apsara K. Herath, Carl J. Lovely
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Oxidative Copolymerization of Pyrrole and N-Methyl Pyrrole

International Journal of Polymer Analysis and Characterization, 2003
Pyrrole and N-methyl pyrrole were copolymerized by ceric ammonium nitrate (CAN) in aqueous solution.
Belkis Ustamehmetoğlu, Eda Kelleboz, A. Sezai Sara¸   +2 more
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Synthesis of pyrrole urea and pyrrole carbonylurea derivatives

Tetrahedron, 2009
Abstract A series of urea and carbonylurea distamycin analogs whereby the linker has two NH groups for hydrogen bonding with base pairs of DNA were synthesized. The urea and carbonylurea derivatives are prepared from the in situ generation of pyrrole isocyanate (prepared from compound 3 ) and acyl isocyanate (compound 9 ), followed by the reaction ...
Meng-Chi Liu, Chi Wi Ong
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The Synthesis of 3-Substituted Pyrroles from Pyrrole

Synthesis, 1985
La reaction d'electrophiles avec le pyrrole se fait preferentiellement en position 1 ou 2; pour obtenir des derives substitues en 3, on protege d'abord la position 1 ou 2 par des substituants orientant la reaction en position 3 ou on utilise en position 2 des substituants permettant un rearrangement conduisant aux pyrroles substituees en 3; une etape ...
Hugh J. Anderson, Charles E. Loader
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Pyrrole chemistry. XXVII. 2,3,4-Trisubstituted pyrroles and a second synthesis of porphobilinogen from pyrrole

Canadian Journal of Chemistry, 1984
Changes in some of the key intermediates and procedures used in our earlier total synthesis of porphobilinogen from pyrrole that improve the yield to 11% are reported. Ethyl pyrrole-3-acetate was formylated by the Vilsmeier–Haack method and then iodinated.
Kurt Faber, Hugh J. Anderson, Charles E. Loader, Annette S. Daley   +3 more
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Formation and Properties of Cyclo[6]pyrrole and Cyclo[7]pyrrole

Journal of the American Chemical Society, 2003
Oxidative coupling of a tetraalkylbipyrrole under FeIII-mediated coupling conditions in the presence of HCl results in a mixture of cyclo[6]- and cyclo[7]pyrroles, as well as the known cyclo[8]pyrrole. This "matched set" of heteroannulenes was analyzed by spectroscopic, electrochemical, and X-ray diffraction methods.
Thomas, Köhler, Daniel, Seidel, Vincent, Lynch, Forrest O, Arp, Zhongping, Ou, Karl M, Kadish, Jonathan L, Sessler   +6 more
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An efficient synthesis of highly substituted pyrrole and bis pyrrole derivatives

Journal of Heterocyclic Chemistry, 2007
Abstractmagnified imageAn efficient synthesis of highly substituted pyrrole and bis pyrrole derivatives is reported.
Rajeshwar Reddy Sagyam, Himabindu Vurimidi, Pratap Reddy Padi, Mahesh Reddy Ghanta   +3 more
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Synthesis and Evaluation of Cytotoxic Activity of Some Pyrroles and Fused Pyrroles

Anti-Cancer Agents in Medicinal Chemistry, 2017
Pyrrole derivatives represent a very interesting class as biologically active compounds. The objective of our study was to investigate the cytotoxic and apoptotic effects and antioxidant activity of the newly synthesized pyrrole derivatives.A series of novel pyrroles and fused pyrroles (tetrahydroindoles, pyrrolopyrimidines, pyrrolopyridines and ...
Samar S, Fatahala, Mosaad S, Mohamed, Mahmoud, Youns, Rania H, Abd-El Hameed   +3 more
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