Results 31 to 40 of about 7,719 (255)

Toward a Comprehensive Treatment of Tautomerism in Chemoinformatics Including in InChI V2

, 2019
We have collected 86 different transforms of tautomeric interconversions. Out of those, 54 are for prototropic (non-ring-chain) tautomerism; 21 for ring-chain tautomerism; and 11 for valence tautomerism.
Devendra K., Dhaked, Wolf, Ihlenfeldt, Hitesh, Patel, Marc, Nicklaus   +3 more
core   +2 more sources

NH Tautomerism of N-Confused Porphyrin

, 2016
NH Tautomerism of N-Confused ...
Hiroyuki Furuta (1520392), Yuichi Ishikawa (653718), Tomoya Ishizuka (1415599), Hirohisa Dejima (2984523), Hidenori Nakagawa (2984520), Atsuhiro Osuka (1393408)   +5 more
core   +2 more sources

Tautomeric Forms of Metarhodopsin [PDF]

The Journal of General Physiology, 1963
Light isomerizes the chromophore of rhodopsin, 11-cis retinal (formerly retinene), to the all-trans configuration. This introduces a succession of unstable intermediates—pre-lumirhodopsin, lumirhodopsin, metarhodopsin —in which all-trans retinal is still attached to the chromophoric site on opsin. Finally, retinal is hydrolyzed from opsin.
R G, MATTHEWS, R, HUBBARD, P K, BROWN, G, WALD   +3 more
openaire   +2 more sources

Schiff bases derived from hydroxyaryl aldehydes: molecular and crystal structure, tautomerism, quinoid effect, coordination compounds

Macedonian Journal of Chemistry and Chemical Engineering, 2010
During the last 50 years a vast number of structural studies on Schiff bases derived from hydroxyaryl aldehydes and their coordination compounds have been undertaken.
Anita Blagus, Dominik Cinčić, Tomislav Friščić, Branko Kaitner, Vladimir Stilinović   +4 more
doaj   +1 more source

Tri-Cyclic Nucleobase Analogs and Their Ribosides as Substrates of Purine-Nucleoside Phosphorylases. II Guanine and Isoguanine Derivatives

Molecules, 2019
Etheno-derivatives of guanine, O6-methylguanine, and isoguanine were prepared and purified using standard methods. The title compounds were examined as potential substrates of purine-nucleoside phosphorylases from various sources in the reverse ...
Alicja Stachelska-Wierzchowska, Jacek Wierzchowski, Michał Górka, Agnieszka Bzowska, Beata Wielgus-Kutrowska   +4 more
doaj   +1 more source

Spectroscopic and ab-initio study of schiff base ligand 4-[(2-hydroxyethylamino)-methylene]-5-methyl-2-p-tolyl-2,4-dihydro-pyrazol-3-one

Molbank, 2006
n ...
Kiran R. Surati, B. T. Thaker, Gavrang Shah   +2 more
doaj   +1 more source

Tautomerism in large databases [PDF]

Journal of Computer-Aided Molecular Design, 2010
We have used the Chemical Structure DataBase (CSDB) of the NCI CADD Group, an aggregated collection of over 150 small-molecule databases totaling 103.5 million structure records, to conduct tautomerism analyses on one of the largest currently existing sets of real (i.e. not computer-generated) compounds.
Markus Sitzmann, Wolf-Dietrich Ihlenfeldt, Marc C. Nicklaus   +2 more
openaire   +2 more sources

Acetylacetone: metal complexes and keto-enol tautomerism – which tautomer is more/less stable?

Acta Chimica Slovenica
Tautomerism is a fundamental concept that studies the transfer of a proton between two constitutional isomers, i.e. keto and enol tautomers, where the enol tautomers are usually less stable than the corresponding carbonyl compound.
Maja Ponikvar-Svet, Kathleen F. Edwards, Joel F. Liebman   +2 more
doaj   +1 more source

π‐Enlargement in Porphyrin Macrocycles at Interfaces

Angewandte Chemie, EarlyView.
On‐surface synthesis of a 20‐π free‐base expanded porphyrin, by depositing onto a hot Ag(111) substrate an 18‐π free‐base precursor equipped with ‐CF3 functional groups ABSTRACT Porphyrins are essential heteroatomic macrocycles, fundamental to both biological systems and advanced technology.
Ana Barragán, Elena Pérez‐Elvira, Alba García‐Frutos, Diego J. Vicent, Pingo Mutombo, Koen Lauwaet, José M. Gallego, Rodolfo Miranda, José I. Urgel, Aurelio Gallardo, Nazario Martín, David Écija   +11 more
wiley   +2 more sources

Blood Biomarkers and Surface‐Enhanced Raman Spectroscopy for Gout: A Comprehensive Review

Advanced Functional Materials, EarlyView.
Schematic illustrating gout disease progression from asymptomatic hyperuricemia to chronic tophaceous disease, highlighting the limitations of conventional imaging and biochemical diagnostics and the potential of engineered SERS platforms for ultrasensitive blood‐based detection of urate‐related biomarkers across disease stages, with the color gradient
Isuri Perera, Chiranjeevi Kanike, Appurva Tiwari, Hongyan Wu, Larry D. Unsworth, Ben Bin Xu, Xuehua Zhang   +6 more
wiley   +1 more source