Results 31 to 40 of about 1,362,496 (337)

1H NMR relaxation in urea

Journal of Molecular Structure, 2007
Abstract Proton NMR spin–lattice relaxation times T1 were measured for urea as a function of temperature. An activation energy of 46.3 ± 4.7 kJ/mol was extracted and compared with the range of 38–65 kJ/mol previously reported in the literature as measured by different magnetic resonance techniques.
Taylor, Robert E, Bacher, Alfred D, Dybowski, C.   +2 more
openaire   +3 more sources

Rapid Identification of Novel Psychoactive and Other Controlled Substances Using Low-Field 1H NMR Spectroscopy

ACS Omega, 2019
An automated approach to the collection of 1H NMR (nuclear magnetic resonance) spectra using a benchtop NMR spectrometer and the subsequent analysis, processing, and elucidation of components present in seized drug samples are reported.
Lysbeth H. Antonides, Rachel M. Brignall, Andrew Costello, Andrew Costello, Jamie R. Ellison, Jamie R. Ellison, Samuel E. Firth, Nicolas Gilbert, Bethany J. Groom, S. J. Hudson, Matthew C. Hulme, J. Marron, Zoe A. Pullen, Thomas B R Robertson, C. Schofield, C. Schofield, D. Williamson, E. K. Kemsley, Oliver B. Sutcliffe, R. Mewis   +19 more
semanticscholar   +1 more source

A Versatile Ligand Platform that Supports Lewis Acid Promoted Migratory Insertion [PDF]

, 2012
A helping hand: Incorporation of Group 2 Lewis acids into a macrocycle appended to a phosphine ligand attached to a rhenium carbonyl complex promotes otherwise unfavorable transformations of coordinated CO (see scheme; M=Ca, Sr).
Bercaw, John E., Hazari, Amaruka, Labinger, Jay A.   +2 more
core   +1 more source

Developing and Standardizing a Protocol for Quantitative Proton Nuclear Magnetic Resonance (1H NMR) Spectroscopy of Saliva

Journal of Proteome Research, 2018
Metabolic profiling by 1H NMR spectroscopy is an underutilized technology in salivary research, although preliminary studies have identified promising results in multiple fields (diagnostics, nutrition, sports physiology).
Alexander Gardner, H. Parkes, G. Carpenter, P. So   +3 more
semanticscholar   +1 more source

Synthesis of 2-Acylphenol and Flavene Derivatives from the Ruthenium-Catalyzed Oxidative C-H Acylation of Phenols with Aldehydes [PDF]

, 2015
The cationic ruthenium hydride complex [(C6H6)(PCy3)(CO)RuH]+BF4− has been found to be an effective catalyst for the oxidative C–H coupling reaction of phenols with aldehydes to give 2-acylphenol compounds.
Aponick, Arockiam, Baslé, Boots, Chan, Charest, Choy, Fristrup, González-Bello, Gore, Gunanathan, Han, Jia, Kakiuchi, Kakiuchi, Kandaswami, Koren-Selfridge, Kwon, Lee, Li, Li, Li, Li, Lyons, Madabhushi, Miyaura, Mo, Ngidi, Obora, Olah, Park, Pastine, Rao, Rappoport, Shan, Sharma, Sigman, Suzuki, Tang, Thirunavukkarasu, Thirunavukkarasu, Thirunavukkarasu, Wang, Yang, Yao, Yeung, Zhang, Álvarez-Bercedo   +47 more
core   +2 more sources

Spectral data of nicotabaflavonoidglycoside

Data in Brief, 2018
The dataset addressed in this article relates to the research article entitled“Nicotabaflavonoidglycoside, the first example of cembranoid and flavonoid heterodimer from Nicotiana tabacum” (Yang et al., 2018) [1]. The dataset presents the MS4(879-571-421-
Cai-Yan Yang, Yao Lin, Hui-Xiong Yuan, Wen-Pei Yang, Xian Wei, Zu-Liang Huang   +5 more
doaj   +1 more source

Rational Design, Synthesis and Biological Evaluation of Pyrimidine-4,6-diamine derivatives as Type-II inhibitors of FLT3 Selective Against c-KIT. [PDF]

, 2018
FMS-like Tyrosine Kinase 3 (FLT3) is a clinically validated target for acute myeloid leukemia (AML). Inhibitors targeting FLT3 have been evaluated in clinical studies and have exhibited potential to treat FLT3-driven AML.
Bharate, Jaideep B, Ding, Lucky, Frett, Brendan, Lakkaniga, Naga Rajiv, Li, Hong-Yu, McConnell, Nicholas, Naresh, Gunaganti, Shah, Neil P, Zhang, Lingtian   +8 more
core   +2 more sources

Structural Identification and Complete NMR Spectral Assignments of 4-Isopropoxy-1-(trifluoroacetyl)naphthalene

Chinese Journal of Magnetic Resonance
In this paper, one-dimensional (1H NMR, 13C NMR, DEPT, and 19F NMR) and two-dimensional NMR (1H-1H COSY, 1H-13C HMBC, and 1H-13C HSQC) techniques were applied to perform structural identification and NMR spectral assignments of the fluorine-containing ...
ZHENG Jiaqi, WANG Yinong, YUAN Siwen, YIN Tianpeng   +3 more
doaj   +1 more source

Synthesis of Optically Active Bifunctional Building Blocks through Enantioselective Copper-Catalyzed Allylic Alkylation Using Grignard Reagents [PDF]

, 2007
Enantioselective copper-catalyzed allylic alkylations were performed on allylic bromides with a protected hydroxyl or amine functional group using several Grignard reagents and Taniaphos L1 as a ligand.
Feringa, Ben L.,, López, Fernando,, Minnaard, Adriaan J.,, Zijl, Anthoni W. van,   +3 more
core   +1 more source

THEORETICAL AND SPECTROSCOPIC STUDIES OF 1-(MORPHOLINE-4-YL-METHYL)-3-BENZYL-4-(4-ISOPROPYL-BENZYLIDENAMINO)-4,5-DIHYDRO-1H-1,2,4-TRIAZOL-5-ONE MOLECULE

Journal of the Turkish Chemical Society, Section A: Chemistry, 2016
In this study, 1-(morpholine-4-yl-methyl)-3-benzyl-4-(4-isopropylbenzylidenamino)-4,5-dihydro-1H-1,2,4-triazol-5-one (1) was synthesized by the reaction of compound 3-benzyl-4-(4-isopropylbenzylidenamino)-4,5-dihydro-1H-1,2,4-triazol-5-one with ...
Gül KOTAN, Haydar Yüksek
doaj   +1 more source