Results 61 to 70 of about 36,836 (288)

Highly diastereoselective 1,3-dipolar cycloaddition of nonstabilized azomethine ylides to 3-nitro-2-trihalomethyl-2H-chromenes: Synthesis of 1-benzopyrano[3,4-c]pyrrolidines [PDF]

, 2013
Reactions of 3-nitro-2-trifluoro(trichloro)methyl-2H-chromenes, including 2-unsubstituted derivatives, with N-alkyl-α-amino acids (sarcosine, proline) and paraformaldehyde proceed diastereoselectively to give 1-benzopyrano[3,4-c]pyrrolidines in good ...
Barkov, A. Y., Kodess, M. I., Korotaev, V. Y., Matochkina, E. G., Moshkin, V. S., Sosnovskikh, V. Y.   +5 more
core   +1 more source

1-(3-Pyridyl)pyrrolidine-2,5-dione [PDF]

Acta Crystallographica Section E Structure Reports Online, 2009
In the title mol-ecule, C(9)H(8)N(2)O(2), the dihedral angle between the pyridine and the pyrrolidine rings is 64.58 (12)°. In the crystal structure, weak C-H⋯π-electron ring inter-actions stabilize the packing.
Luan-Fang Yang, Yi-Ming Liu, Hong-Bo Hou
openaire   +3 more sources

Spatial Control Over Tether‐Tunable Coordination on Palladium for Divergent Synthesis of Bicyclo[n.1.0]alkanes via Oxidative Cyclopropanation of Enynes

Advanced Science, EarlyView.
We have developed a Pd‐catalyzed oxidative cyclopropanation of 1,n‐enynes employing cyclic diacyl peroxides as bifunctional reagents that serve as both tether‐tunable oxidants and spatially controlled dicarboxylate anions. ABSTRACT Bicyclo[n.1.0]alkanes are highly valuable scaffolds in drug discovery and synthetic chemistry.
Ting Yuan, Lei Shi
wiley   +1 more source

Asymmetric 1,3-Dipolar Cycloadditons of Stabilized Azomethine Ylides with Nitroalkenes [PDF]

, 2014
This review highlights the biological importance of many polysubstituted nitro-prolines and -pyrrolidines. Their preparation using asymmetric 1,3-dipolar cycloadditions of azomethine ylides with nitroalkenes using diastereoselective and enantioselective ...
Nájera, Carmen, Sansano, Jose M.
core   +2 more sources

Transient and intermediate carbocations in ruthenium tetroxide oxidation of saturated rings

Beilstein Journal of Organic Chemistry, 2019
The ruthenium tetroxide-mediated oxidation of cyclopentane, tetrahydrofuran, tetrahydrothiophene and N-substituted pyrrolidines has been studied computationally by DFT and topological (analysis of the electron localization function, ELF) methods.
Manuel Pedrón, Laura Legnani, Maria-Assunta Chiacchio, Pierluigi Caramella, Tomás Tejero, Pedro Merino   +5 more
doaj   +1 more source

Copper(I)-Catalyzed Cross-Coupling of 1-Bromoalkynes with N-Heterocyclic Organozinc Reagents

Molecules, 2022
Nitrogen-containing heterocycles represent the majority of FDA-approved small-molecule pharmaceuticals. Herein, we describe a synthetic method to produce saturated N-heterocyclic drug scaffolds with an internal alkyne for elaboration.
Christian Frabitore, Jérome Lépeule, Tom Livinghouse   +2 more
doaj   +1 more source

Breaking the Durability–Power Trade‐Off: Boron‐Directed Faceted O3 Cathodes for High‐Rate Sodium‐Ion Batteries

Advanced Energy Materials, EarlyView.
Boron‐oxide‐assisted particle engineering stabilizes O3‐type layered cathodes for sodium‐ion batteries by mitigating phase transitions and lattice strain. Acting as flux and structural modifier, boron forms submicron hexagonal platelets with (003) facets and expanded Na‐layer spacing, enabling rapid Na⁺ diffusion and mechanical resilience.
Tengfei Song, Alexis Manche, Dongrui Xie, Bowen Liu, Chenglong Wu, Bo Dong, Reda Malakauskaite, Manoj Ovhal, David O. Scanlon, Emma Kendrick   +9 more
wiley   +1 more source

Stereoselective Ag-Catalyzed 1,3-Dipolar Cycloaddition of Activated Trifluoromethyl-Substituted Azomethine Ylides [PDF]

, 2016
This is the peer reviewed version of the following article: Chemistry – A European Journal 22.14 (2016): 4952 - 4959, which has been published in final form at http://doi.org/10.1002/chem.201504869. This article may be used for non-commercial purposes in
Adrio, Adrio, Arai, Bai, Beausoleil, Begue, Belhomme, Bezdudny, Bonin, Burger, Castello, Castelló, Chaume, Cheng, Corbett, Dai, Dai, Daly, Das, Erickson, Fritz, Fujiwara, González-Esguevillas, Gouverneur, Hashimoto, He, Huang, Khangarot, Kuhnert, Laduron, Li, Li, Li, Llamas, Ma, McAlpine, Michael, Müller, Nájera, O'Hagan, Ojima, Padilla, Pandey, Pascual-Escudero, Pellissier, Pinho e Melo, Potowski, Purser, Pyne, Roughley, Sato, Schlosser, Song, Stanley, Sun, Tanaka, Tran, van Niel, Whitby, Yan, Yang, Yuan, Zhao   +62 more
core   +2 more sources

Rh(II)/Pd(0) Dual Catalysis: Carbenoid N-H Insertion/Allylation Cascade Reaction to Construct Highly Functionalized and Polysubstituted Pyrrolidines

Molecules
In the category of drugs approved by the U.S. FDA, pyrrolidine is the most frequently used core of five-membered nonaromatic heterocycles containing nitrogen.
Maocheng Tang, Xianyan Jiao, Deping He, Ji-Xing Zhao, Ping Liu, Chun-Tian Li   +5 more
doaj   +1 more source

Surface Functionalization of Si Nanoparticles by Hydrosilylation: Access to High‐Performance Si Anodes for Li‐Ion Batteries

Advanced Energy and Sustainability Research, EarlyView.
Surface‐functionalized SiNPs are synthesized by a simple and scalable hydrosilylation method using 4‐vinylpyridine (4VP), 1‐vinyl‐2‐pyrrolidinone (1V2P), and acrylic acid (AA). The Si‐4VP‐based Li‐ion cells achieved a promising long life of 300 cycles, retaining 60% of the initial capacity (2375 mAh g−1).
Sadananda Muduli, Jesús M. Blázquez‐Moreno, Martin Frey, Michael R. Buchmeiser   +3 more
wiley   +1 more source