Results 41 to 50 of about 3,034,026 (343)

The tert-Amino Effect in Heterocyclic Chemistry. Synthesis of Spiro Heterocycles

Molecules, 2005
The tert-amino reaction effect was examined. A new method to synthesize spiro heterocycles is presented. It was shown that the “tert-amino effect” could be applied to the formation of spiro-fused heterocycles.
Y. Morzherin, O. Eltsov, L. Dyudya, T. Glukhareva, E. D’yachenko   +4 more
doaj   +1 more source

Synthesis and evaluation of the antioxidant activity of new spiro-1,2,4-triazine derivatives applying Ag/Fe3O4/CdO@MWCNT MNCs as efficient organometallic nanocatalysts

Frontiers in Chemistry, 2022
We applied the Petasites hybridus rhizome water extract as green media so that Ag/Fe3O4/CdO@ multi-walled carbon nanotubes magnetic nanocomposites (Ag/Fe3O4/CdO@MWCNTs MNCs) could be prepared.
Elham Ezzatzadeh, Somayeh Soleimani-Amiri, Zinatossadat Hossaini, Khatereh Khandan Barani   +3 more
doaj   +1 more source

Phenalene-phosphazene complexes: effect of exocyclic charge densities on the cyclotriphosphazene ring system [PDF]

, 1988
The synthesis and properties of a new series of 1,9-diamino-substituted phenalene complexes of the cyclotriphosphazene ring system is described. One of the compounds is shown to be amphoteric, and this behavior allows an examination of the response of ...
Chichester-Hicks, S. V., Haddon, R. C., Mayo, Stephen L.   +2 more
core   +1 more source

Doming Modes and Dynamics of Model Heme Compounds [PDF]

, 2002
Synchrotron far-IR spectroscopy and density-functional calculations are used to characterize the low-frequency dynamics of model heme FeCO compounds.
Czarnecki, Kazimierz, Hemley, Russell J., Kincaid, James R., Klug, Dennis D., Liu, Zhenxian, Tse, John S., Zgierski, Marek Z.   +6 more
core   +3 more sources

Multiple photoluminescence of spiro[acridine-fluorene]-based o-carboranyl compounds with potential as a visual sensory material

Journal of Materials Chemistry C, 2020
Two spiro[acridine-9,9′-fluorene]-based closo-o-carboranyl compounds were prepared and they demonstrated the application potential of π-aromatic conjugated o-carboranyl compounds as visual sensory materials.
M. Mun, C. Ryu, Hyunhee So, Mingi Kim, Ji Hye Lee, Hyonseok Hwang, K. Lee   +6 more
semanticscholar   +1 more source

Microbial Transformation of neo-Clerodane Diterpenoid, Scutebarbatine F, by Streptomyces sp. CPCC 205437

Frontiers in Microbiology, 2021
Biotransformation of the neo-clerodane diterpene, scutebarbatine F (1), by Streptomyces sp. CPCC 205437 was investigated for the first time, which led to the isolation of nine new metabolites, scutebarbatine F1–F9 (2–10). Their structures were determined
Dewu Zhang, Xiaoyu Tao, Guowei Gu, Yujia Wang, Wenxia Zhao, Wuli Zhao, Yan Ren, Shengjun Dai, Liyan Yu   +8 more
doaj   +1 more source

Investigating nano-structuring within imidazolium ionic liquids: A thermodynamic study using photochromic molecular probes [PDF]

, 2009
Following previous studies involving the thermal relaxation of spirocyclic compounds we extended our studies to investigate the formation of nano-structured domains in ionic liquids (ILs).
Byrne, Robert, Coleman, Simon, Diamond, Dermot, Minkovska, Stela   +3 more
core   +1 more source

The production and detoxification of a potent cytotoxin, nitric oxide, by pathogenic enteric bacteria [PDF]

, 2011
The nitrogen cycle is based on several redox reactions that are mainly accomplished by prokaryotic organisms, some archaea and a few eukaryotes, which use these reactions for assimilatory, dissimilatory or respiratory purposes.
Anke Arkenberg, Bleakley, Bodenmiller, Brunelli, Chakravortty, Cherayil, Constantinidou, Crawford, Cruz-Ramos, David J. Richardson, Filenko, Gardner, Gary Rowley, Gilberthorpe, Gilchrist, Husain, Justino, Mastroeni, Miller, Mills, Overton, Prior, Pullan, Ramotar, Richardson, Rodionov, Sebastian Runkel, Shiloh, Smith, Spiro, Todorovic, Tripathi, van Wonderen, Vine, Vine, Wang, Wink   +36 more
core   +1 more source

1,6-Conjugate-Addition-Induced [2 + 1] Annulation of para-Quinone Methides and Pyrazolones: Synthesis of Bis-Spiro Compounds with Contiguous Quaternary Spiro-Centers.

Organic Letters, 2019
A diastereoselective formal 1,6-conjugate-addition-mediated [2 + 1] annulation reaction using p-quinone methides and pyrazolones has been described. The corresponding bis-spiro[cyclohexadienone-cyclopropane-pyrazolone] compounds were obtained in very ...
S. B. Kale, Popat K. Jori, Thanusha Thatikonda, R. Gonnade, U. Das   +4 more
semanticscholar   +1 more source

One-Pot Synthesis of Spiro-isobenzofuran Compounds via the Sequential Condensation/Oxidation Reaction of Ninhydrin with 4-Amino-1,2-naphthoquinones/2-Amino-1,4-naphthoquinones under Mild Conditions

ACS Omega, 2020
A one-pot route for the synthesis of spiro-isobenzofuran compounds was developed via the condensation reaction of ninhydrin with 4-amino-1,2-naphthoquinones or 2-amino-1,4-naphthoquinones in acetic acid followed by the oxidative cleavage of the ...
S. H. Mousavi, M. Mohammadizadeh, Z. Roshan, Azar Jamaleddini, S. Arimitsu   +4 more
semanticscholar   +1 more source