Results 151 to 160 of about 17,027 (206)

Highly Enantioselective Partial Hydrogenation of Simple Pyrroles: A Facile Access to Chiral 1-Pyrrolines [PDF]

Journal of the American Chemical Society, 2011
Highly Enantioselective Partial Hydrogenation of Simple Pyrroles: A Facile Access to Chiral 1-PyrrolinesA highly enantioselective Pd-catalyzed partial hydrogenation of simple 2,5-disubstituted pyrroles with a Bronsted acid as an activator has been ...
Zhishi Ye, Yong-Gui Zhou, Duo-Sheng Wang   +2 more
exaly   +2 more sources

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Pyrrole Protection

ChemInform, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Benoit Jolicoeur, Erin E. Chapman, Alison Thompson, William D. Lubell   +3 more
openaire   +1 more source

The Oxidation of Pyrrole

Chemistry – An Asian Journal, 2015
AbstractThe dearomatization of heterocycles has been a powerful means for producing functional molecules in synthesis. In the case of pyrroles, reductive methods (such as the Birch reduction) have been most widely exploited, while oxidative methods are generally dismissed as too difficult or unpredictable to be useful.
James K, Howard, Kieran J, Rihak, Alex C, Bissember, Jason A, Smith   +3 more
openaire   +2 more sources

A new synthesis of pyrroles

Chem. Commun., 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Quiclet-Sire, Béatrice, Wendeborn, Frédérique, Zard, Samir, Z.   +2 more
openaire   +3 more sources

A novel pyrrole synthesis

Org. Biomol. Chem., 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Sameer, Agarwal, Hans-Joachim, Knolker
openaire   +2 more sources

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
openaire   +1 more source

B(C6F5)3-Catalyzed Dehydrogenation of Pyrrolidines to Form Pyrroles [PDF]

ACS Catalysis
Pyrroles are important N-heterocycles found in medicines and materials. The formation of pyrroles from widely accessible pyrrolidines is a potentially attractive strategy but is an underdeveloped approach due to the sensitivity of pyrroles to the ...
Fabrizio Ortu, Rebecca R Hawker, Yang Li   +2 more
exaly   +3 more sources

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
openaire   +1 more source

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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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
openaire   +1 more source