Results 41 to 50 of about 6,162 (180)

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

Chemical evolution of the colour systems generated by riccionidin A, 3-deoxyanthocyanidins and anthocyanins [PDF]

, 2020
UIDB/50006/2020 MEX/Ref. 288188The kinetics and thermodynamics (in acidic solutions) of the five chemical species reversibly interconnected by external stimuli (a multistate), such as pH and light, generated by the liverworts colorant riccionidin A were ...
Alejo-Armijo, Alfonso, Mendoza, Johan, Parola, A. Jorge, Pina, Fernando   +3 more
core   +1 more source

Thermal and photochemical reactions of n-pyridinebenzopyrylium multistate of species (n = 2′,3′,4′). Exploring the synthetic potentialities from the unique reactivity of position 2′ [PDF]

, 2023
Funding Information: This work was supported by the Associate Laboratory for Green Chemistry – LAQV (projects UIDB/50006/2020 and UIDP/ 50006/2020), the Research Unit on Applied Molecular Biosciences – UCIBIO (projects UIDP/04378/2020 and UIDB/ 04378 ...
Alejo-Armijo, Alfonso, Camuenho, Ambrósio, Gomes, Clara S. B., Jorge Parola, A., Laia, César A. T., Pina, Fernando   +5 more
core   +1 more source

(E)-3-(4-Methylphenyl)-1-(1,3-thiazol-2-yl)prop-2-en-1-one

Acta Crystallographica Section E, 2012
In the title chalcone, C13H11NOS, derived from the condensation of p-tolualdehyde and 1-(1,3-thiazol-2-yl)ethanone, the olefine group has a trans configuration. No classical hydrogen bonding is present in the crystal structure.
Annamalai Palaniappan, Arumugam Arulmozhivarman, Rajamanickam Ramachandran, Subramanian Srinivasan, Sivakolunthu Senthan   +4 more
doaj   +1 more source

Electron Paramagnetic Resonance Study of the Radiation Damage in Trans-Chalcone Single Crystal

Acta Physica Polonica A, 2019
Gamma irradiated trans-chalcone (C15H12O) single crystals are investigated at 120 K using electron paramagnetic resonance technique. Trans-chalcone single crystals are irradiated with Co-60-gamma rays, at room temperature. The EPR spectra of gamma irradiated trans-chalcone single crystals are studied for different orientations of crystals in a magnetic
Çalışkan, Betül., Cengiz Caliskan, A.   +1 more
openaire   +4 more sources

(2E,4E)-1-(2-Hydroxyphenyl)-5-phenylpenta-2,4-dien-1-one

Acta Crystallographica Section E, 2011
In the structure of the title chalcone, C17H14O2, derived from cinnamaldehyde, the olefine group has a trans configuration. The molecular conformation is stabilized by an intramolecular O—H...O hydrogen-bond interaction with graph-set motif S(6)
W. A. Silva, C. C. Gatto, G. R. Oliveira
doaj   +1 more source

Natural and Synthetic Flavylium-Based Dyes: The Chemistry behind the Color [PDF]

, 2022
Funding Information: This research was supported by project grants (PTDC/OCE-ETA/31250/2017; PTDC/QUI-COL/32351/2017), with financial support from FCT/MEC through national funds and cofinancing from FEDER, in Partnership Agreement PT2020 (UIDB/50006/2020
Basílio, Nuno, Cruz, Luis, De Freitas, Victor, Mateus, Nuno, Pina, Fernando   +4 more
core   +1 more source

(E)-3-{4,6-Dimethoxy-2-[(E)-4-methoxystyryl]-3-methylphenyl}-1-(2-hydroxy-5-methoxyphenyl)prop-2-en-1-one

IUCrData, 2020
In the title compound, C28H28O6, the benzene rings in the resveratrol moiety are connected by a trans C=C double bond, and the hydroxyl group containing a benzene ring and the central benzene ring are linked through a C=(O)—C=C (enone) moiety to form a ...
Miri Yoo, Dongsoo Koh
doaj   +1 more source

Synthesis, Characterization, Antioxidant Activity and Conformational Study of 4-Hydroxychalcone

Orbital: The Electronic Journal of Chemistry, 2021
The objective of this work was to develop a synthesis, characterization, and conformational study of 4-hydroxychalcone. The chalcone was obtained using Claisen-Schmidt reaction. The product was characterized by IR and NMR spectroscopy.
André Luis Kerek, Thiago de Castro Rozada, Barbara Celânia Fiorin   +2 more
doaj   +3 more sources

Crystal structure of (E)-3-(2-hydroxy-4-methylphenyl)-1-(2,4,6-trimethoxyphenyl)prop-2-en-1-one

Acta Crystallographica Section E: Crystallographic Communications, 2019
The title chalcone derivative, C19H20O5, adopts a trans configuration with respect to the olefinic C=C double bond. The 2-hydroxy-4-methylphenyl ring is coplanar with the attached enone bridge [torsion angle = −179.96 (14)°], where this plane is nearly ...
Maadh Jumaah, Huey Chong Kwong, Melati Khairuddean   +2 more
doaj   +1 more source