Results 21 to 30 of about 47,089 (385)

CeO2/CuO@N-GQDs@NH2 nanocomposite as a reusable and efficient catalyst for the synthesis of piperidines [PDF]

Nanochemistry Research, 2020
An efficient pseudo six-component synthesis of bis-spiropiperidinesis presented by one-pot condensation of formaldehyde, aromatic amine and dimedone or N,N-dimethyl-barbituric acid using CeO2/CuO@N-GQDs@NH2 nanocomposite at room temperature. The catalyst
Hossein Shahbazi-Alavi, Javad Safaei-Ghomi, Mozhgan Esfandiari   +2 more
doaj   +1 more source

Synthesis of Stereoenriched Piperidines via Chemo-Enzymatic Dearomatization of Activated Pyridines

Journal of the American Chemical Society, 2021
The development of efficient and sustainable methods for the synthesis of nitrogen heterocycles is an important goal for the chemical industry. In particular, substituted chiral piperidines are prominent targets due to their prevalence in medicinally ...
Vanessa Harawa, T. Thorpe, J. Marshall, Jack J. Sangster, A. Gilio, L. Pirvu, Rachel S. Heath, Antonio Angelastro, J. Finnigan, S. Charnock, Jordan Nafie, G. Grogan, R. Whitehead, N. Turner   +13 more
semanticscholar   +1 more source

One-Pot Route from Halogenated Amides to Piperidines and Pyrrolidines

Molecules, 2022
Piperidine and pyrrolidine derivatives are important nitrogen heterocyclic structures with a wide range of biological activities. However, reported methods for their construction often face problems of requiring the use of expensive metal catalysts ...
Qiao Song, Sheng Wang, Xiangui Lei, Yan Liu, Xin Wen, Zhouyu Wang   +5 more
doaj   +1 more source

Exploration of Spirocyclic Derivatives of Ciprofloxacin as Antibacterial Agents

Molecules, 2022
The previously reported as well as newly synthesized derivatives of the 1-oxa-9-azaspiro[5.5]undecane were employed in the synthesis of thirty-six derivatives of ciprofloxacin using commercially available 7-chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4 ...
Alexei Lukin, Mikhail Chudinov, Tatiana Vedekhina, Elizaveta Rogacheva, Lyudmila Kraeva, Olga Bakulina, Mikhail Krasavin   +6 more
doaj   +1 more source

PIPERIDINE : A CORRECTION. [PDF]

The Lancet, 1898
n ...
Tunnicliffe, F. W., Rosenheim, Otto
openaire   +2 more sources

1-[(3-Nitrophenyl)(piperidin-1-yl)methyl]piperidine [PDF]

Acta Crystallographica Section E Structure Reports Online, 2012
In the crystal structure of the title compound, C17H25N3O2, one-dimensional chains are formed via intermolecular C—H...O hydrogen bonds along the a axis.
Yi Ma, Zhe-Qin Wang
openaire   +4 more sources

Highly Diastereoselective Functionalization of Piperidines by Photoredox Catalyzed α-Amino C-H Arylation and Epimerization.

Journal of the American Chemical Society, 2020
We report a photoredox catalyzed α-amino C-H arylation reaction of highly substituted piperidine derivatives with electron deficient cyano(hetero)arenes.
Morgan M. Walker, Brian Koronkiewicz, Shuming Chen, K. N. Houk, J. Mayer, J. Ellman   +5 more
semanticscholar   +1 more source

4-[4-(Piperidin-1-yl)piperidin-1-yl]benzonitrile [PDF]

Acta Crystallographica Section E Structure Reports Online, 2010
In the title compound, C(17)H(23)N(3), both piperidine rings adopt chair conformations. In the crystal packing, intermolecular C-H⋯N hydrogen bonds and C-H⋯π interactions are present.
Lijuan Chen, Guobin Xu, Jianyou Shi, Youfu Luo   +3 more
openaire   +4 more sources

Accessing (Multi)Fluorinated Piperidines Using Heterogeneous Hydrogenation

ACS Catalysis, 2020
Fluorinated piperidines are desirable motifs for pharmaceutical and agrochemical research. Nevertheless, general synthetic access remains out of reach.
Tobias Wagener, A. Heusler, Zackaria Nairoukh, K. Bergander, C. Daniliuc, F. Glorius   +5 more
semanticscholar   +1 more source

Crystal structure of a tetranuclear CuII complex with an O,N,N′-donor Schiff base ligand: hexa-μ2-acetato-bis(2-{[(2,2,6,6-tetramethylpiperidin-4-yl)imino]methyl}phenolato-κ3O,N,N′)tetracopper(II)

Acta Crystallographica Section E: Crystallographic Communications, 2016
The title compound, [Cu4(CH3COO)6(C16H23N2O)2], lies across a twofold rotation axis. The asymmetric unit contains two independent CuII ions. The symmetry-unique terminal CuII ion is O,N,N′-coordinated by a 2-{[(2,2,6,6-tetramethylpiperidin-4-yl)imino ...
Guohui Huang, Xiaoxuan Liu
doaj   +1 more source