Results 31 to 40 of about 111,031 (327)

Crystal structures of (5RS)-(Z)-4-[5-(furan-2-yl)-3-phenyl-4,5-dihydro-1H-pyrazol-1-yl]-4-oxobut-2-enoic acid and (5RS)-(Z)-4-[5-(furan-2-yl)-3-(thiophen-2-yl)-4,5-dihydro-1H-pyrazol-1-yl]-4-oxobut-2-enoic acid

Acta Crystallographica Section E: Crystallographic Communications, 2016
The title compounds, C17H14N2O4 (I) and C15H12N2O4S (II), possess very similar molecular geometries. In both molecules, the central 1,3,5-trisubstituted dihydropyrazole ring adopts an envelope conformation.
Kseniya K. Borisova, Flavien A. A. Toze, Nniyaz Z. Yagafarov, Fedor I. Zubkov, Pavel V. Dorovatovskii, Yan V. Zubavichus, Victor N. Khrustalev   +6 more
doaj   +1 more source

On the Role of Protonic Acid Sites in Cu Loaded FAU31 Zeolite as a Catalyst for the Catalytic Transformation of Furfural to Furan

Molecules, 2021
The aim of the present paper is to study the speciation and the role of different active site types (copper species and Brønsted acid sites) in the direct synthesis of furan from furfural catalyzed by copper-exchanged FAU31 zeolite.
Łukasz Kuterasiński, Małgorzata Smoliło-Utrata, Joanna Kaim, Wojciech Rojek, Jerzy Podobiński, Katarzyna Samson, Dorota Duraczyńska, Małgorzata Zimowska, Mariusz Gackowski, Dorota Rutkowska-Zbik   +9 more
doaj   +1 more source

Microwave-Assisted Synthesis and Evaluation of Antimicrobial Activity of 3-{3-(s-Aryl and s-Heteroaromatic)acryloyl}-2Hchromen-2-one Derivatives [PDF]

, 2010
The exploration of potential utilization of microwaves as an energy source for heterocyclic synthesis was herein investigated using condensation of 3-acetylcoumarin (1) with aromatic and heteroaromatic aldehydes to afford the corresponding aromatic ...
Ajani, Al-Soud, Anderson, Anzari, Curir, DekicÌ, Devi, Gaber, Govori, Gürsoy, Hayes, Hwu, Jayashree, Kontogiorgis, Kostova, Kotali, Lacy, Larsen, Lee, Lewis, Lisgarten, Luszcski, Lévai, Majumdar, Mashelkar, Meteeva, Montagner Souza, Mouri, Neyts, Pivonka, Ragitha, Raviraj, Roma, Russell, Satyanarayana, Saxena, Schobert, Siddiqui, Son, Srinivas, Tamilvanan, Tassies, Tosun, Tran, Venugopala, Yamamoto, Yenjai, Yun   +47 more
core   +1 more source

Crystal structure of (4-chlorophenyl)[2-(10-hydroxyphenanthren-9-yl)phenanthro[9,10-b]furan-3-yl]methanone

Acta Crystallographica Section E, 2014
In the title compound, C37H21ClO3, the dihedral angle between the two phenanthrene moieties is 57.79 (5)°. The furan and one of the phenanthrene groups are fused in an almost coplanar arrangement [dihedral angle = 5.14 (8)°] and the furan unit makes ...
L. U. Sajitha, M. Sithambaresan, Jomon P. Jacob, M. R. Prathapachandra Kurup   +3 more
doaj   +1 more source

Improved Monitoring and Diagnosis of Transformer Solid Insulation Using Pertinent Chemical Indicators

Energies, 2021
Transformers are generally considered to be the costliest assets in a power network. The lifetime of a transformer is mainly attributable to the condition of its solid insulation, which in turn is measured and described according to the degree of ...
Vahid Behjat, Reza Emadifar, Mehrdad Pourhossein, U. Mohan Rao, Issouf Fofana, Reza Najjar   +5 more
doaj   +1 more source

Enantioselective synthesis of (+)-petromyroxol, enabled by rhodium-catalyzed denitrogenation and rearrangement of a 1-sulfonyl-1,2,3-triazole [PDF]

, 2015
Petromyroxol is a non-racemic mixture of enantiomeric oxylipids isolated from water conditioned with larval sea lamprey. The (+)-antipode exhibits interesting biological properties but only 1 mg was isolated from >100000 L of water.
Boyer, Alistair
core   +2 more sources

(Furan-2-yl)[(furan-2-yl)carbonyldisulfanyl]methanone [PDF]

Acta Crystallographica Section E Structure Reports Online, 2011
The mol-ecule of the title compound, C(10)H(6)O(4)S(2), has crystallographically imposed twofold symmetry. The dihedral angle formed by the furan rings is 80.90 (8)°. In the crystal, mol-ecules are linked by weak C-H⋯O hydrogen bonds into chains running parallel to the a axis [C-S-S-C torsion angle = 82.04 (11)°].
Qian Wang, Youqin Shu, Xuehui Hou
openaire   +3 more sources

Furan-PNA : a mildly inducible irreversible interstrand crosslinking system targeting single and double stranded DNA [PDF]

, 2016
We here report on the design and synthesis of tailor-made furan-modified peptide nucleic acid (PNA) probes for covalent targeting of single stranded DNA through a crosslinking strategy.
Corradini, Roberto, Gyssels, Ellen, Madder, Annemieke, Manicardi, Alex   +3 more
core   +2 more sources

Red-Fleshed Apple Anthocyanin Extract Reduces Furan Content in Ground Coffee, Maillard Model System, and Not-from-Concentrate Apple Juice

Foods, 2021
Furan is a volatile and carcinogenic heterocyclic chemical compound that occurs in a wide range of thermally processed food. It can be induced during food-preparing processes by high temperatures and UV-C light.
Bin Wang, Shenghui Jiang, Yanbo Wang, Jihua Xu, Meng Xu, Xiaohong Sun, Jun Zhu, Yugang Zhang   +7 more
doaj   +1 more source

Free radical 5-exo-dig cyclization as the key step in the synthesis of bis-butyrolactone natural products: experimental and theoretical studies [PDF]

, 2011
Radical cyclization reactions were performed by 5-exo-dig mode to yield cis-fused bicyclic systems, leading to the synthesis of bis-butyrolactone class of natural products.
Allinger, Baldwin, Beckwith, Beckwith, Beckwith, Blot, Cossy, Curtiss, Devoju Harinada Chary, Florian Achrainer, Gangavaram V. M. Sharma, Hendrik Zipse, Lii, Lii, Nagula Chandramouli, Sateesh Patrudu, Sharma, Sharma, Sharma, Sharma, Sharma, Sharma, Srikrishna, Yu   +23 more
core   +1 more source