Results 41 to 50 of about 205,200 (319)

Iron-Catalyzed Sulfonylmethylation of Imidazo[1,2-α]pyridines with N,N-Dimethylacetamide and Sodium Sulfinates

Molecules
Functionalized imidazo[1,2-α]pyridines are important scaffolds in pharmaceuticals. Herein, we present an efficient 3-sulfonylmethylation protocol for imidazo[1,2-α]pyridines by sodium sulfinates in DMA and H2O (2:1) via an FeCl3-catalyzed three-component
Shengnan Sun, Hexia Ye, Haibo Liu, Junchen Li, Xiaojing Bi   +4 more
doaj   +1 more source

Intramolecular carbolithiation of N-allyl-ynamides: an efficient entry to 1,4-dihydropyridines and pyridines – application to a formal synthesis of sarizotan

Beilstein Journal of Organic Chemistry, 2012
We have developed a general synthesis of polysubstituted 1,4-dihydropyridines and pyridines based on a highly regioselective lithiation/6-endo-dig intramolecular carbolithiation from readily available N-allyl-ynamides.
Wafa Gati, Mohamed M. Rammah, Mohamed B. Rammah, Gwilherm Evano   +3 more
doaj   +1 more source

Über 1-Aza-bicyclo-heptane

CHIMIA, 1976
A simple way to synthesize 7-phenyl-1-aza-bicyclo[2,2,1]heptanes out of 4-benzoyl-pyridines is described. The corresponding 3- benzoyl-pyridines did not yield the expected 7-phenyl-1-azabicyclo [3,1,1] heptanes.
A. Marxer
doaj   +1 more source

Development of highly selective ligands for separations of actinides from lanthanides in the nuclear fuel cycle [PDF]

, 2011
This account summarizes recent work by us and others on the development of ligands for the separation of actinides from lanthanides contained in nuclear waste streams in the context of a future European strategy for nuclear waste management. The current
Harwood, Laurence, Hudson, Michael J., Lewis, Frank   +2 more
core   +1 more source

New Pyridine Derivatives from Essential Oils

CHIMIA, 1992
Four new pyridines 1–4 have been isolated from jonquil absolute and their structures confirmed by synthesis. These pyridines also occur in other essential oils.
Bruno Maurer, Arnold Hauser
doaj   +2 more sources

Introduction of the difluoromethyl group at the meta- or para-position of pyridines through regioselectivity switch

Nature Communications
Difluoromethyl pyridines have gained significant attention in medicinal and agricultural chemistry. The direct C−H-difluoromethylation of pyridines represents a highly efficient economic way to access these azines.
Pengwei Xu, Zhe Wang, Shu-Min Guo, Armido Studer   +3 more
doaj   +1 more source

Halogen Bonding in Isostructural Co(II) Complexes with 2-Halopyridines

Crystals, 2020
Three complexes [Co(2-XPy)2Cl2] (X = Cl, Br, and I) were prepared and characterized, representing a rare case of isostructurality within the Cl-Br-I row.
Sergey A. Adonin, Mikhail A. Bondarenko, Alexander S. Novikov, Maxim N. Sokolov   +3 more
doaj   +1 more source

Organocatalytic Lewis base functionalisation of carboxylic acids, esters and anhydrides via C1-ammonium or azolium enolates [PDF]

, 2014
This tutorial review highlights the organocatalytic Lewis base functionalisation of carboxylic acids, esters and anhydrides via C1-ammonium/azolium enolates.
Morrill, Louis C., Smith, Andrew D.
core   +1 more source

Flexibility and Dynamicity Enhances and Controls Supramolecular Self‐Assembly of Zinc(II) Metallogels

Advanced Functional Materials, EarlyView.
Zinc(II) coordination complexes with tunable aryloxy‐imine ligands exhibit controllable supramolecular self‐assembly into hierarchical fibrous structures. Coordination‐driven stacking, not π–π interactions, enables gelation, dynamic assembly/disassembly, and enhanced nanomechanical properties.
Merlin R. Stühler, Hesam Makki, Dorothee Silbernagl, Mathias Dimde, Kai Ludwig, Bengt E. Tegner, Christopher Greve, Konstantin Rausch, Eva M. Herzig, Anna Köhler, Alex J. Plajer   +10 more
wiley   +1 more source

One-Pot Synthesis of 2-Phenylimidazo[1,2-α]pyridines from Acetophenone, [Bmim]Br3 and 2-Aminopyridine under Solvent-Free Conditions

Molecules, 2012
One-pot synthesis of 2-phenylimidazo[1,2-α]pyridines from acetophenone, [Bmim]Br3 and 2-aminopyridine under solvent-free conditions in the presence of Na2CO3, gave the corresponding 2-phenylimidazo[1,2-α]pyridines in excellent yields ...
Jian-Ping Xu, Zong-Bo Xie, Zhang-Gao Le
doaj   +1 more source