scholarly journals 2-Hydroxy-3-(4-oxy(2,2,6,6-tetramethylpiperidin-1-oxyl)butoxy)benzaldehyde

Molbank ◽  
10.3390/m1245 ◽  
2021 ◽  
Vol 2021 (3) ◽  
pp. M1245
Author(s):  
Anatoliy A. Vereshchagin ◽  
Julia V. Novoselova ◽  
Arseniy Y. Kalnin ◽  
Daniil A. Lukyanov
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Electrode Materials ◽  
High Resolution Mass Spectrometry ◽  
Alkylation Reaction ◽  
Scientific Interest ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Type Complex ◽  
Resolution Mass

Salen-type complexes with transition metals and corresponding polymers attract great scientific interest due to their high electrochemical properties and potential for use as part of next generation organic energy storage devices. Because of their good conductivity but relatively low capacity, energy-intensive additives such as quinones or TEMPO fragments can significantly enhance the capacitive characteristics of the electrode materials. Herein, we report a preparation of precursor for a modified Salen-type complex, the substituted 2,3-Dihydroxybenzaldehyde by butoxy linkers with TEMPO fragment using alkylation reaction. The resulting product was characterized by the 1H and 13C, COSY, HMBC, HSQC nuclear magnetic resonance (NMR), ESI–high resolution mass spectrometry (ESI–HRMS), and Fourier-transform infrared spectroscopy (FTIR). The reported approach opens the way for easy modification of Salen-type complexes in order to increase their specific characteristics.

scholarly journals Synthesis of spiro[benzo[4,5]imidazo[2,1-b][1,3]thiazole-2,3-thiolane]s via sulfa-Michael/aldol cascade reactions

2019 ◽  
Vol 43 (1-2) ◽  
pp. 63-66 ◽  
Author(s):  
Jiaying Lei ◽  
Xinliang Fu ◽  
Yulin Huang ◽  
Xiaofang Li
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Resolution ◽  
High Resolution Mass Spectrometry ◽  
Cascade Reactions ◽  
Cascade Reaction ◽  
Crystallographic Analysis ◽  
X Ray ◽  
Resolution Mass

The sulfa-Michael/aldol cascade reaction of ( Z)-2-arylmethylidene-benzo[4,5]imidazo[2,1- b]thiazol-3(2H)-ones and 1,4-dithiane-2,5-diol afforded novel 2-aryl-4-hydroxy-spiro[benzo[4,5]imidazo[2,1- b][1,3]thiazole-2,3-thiolan]-3-ones in moderate yields. The structures of all the products were characterized thoroughly by nuclear magnetic resonance, infrared and high-resolution mass spectrometry together with X-ray crystallographic analysis.

scholarly journals Bioactive Indolyl Diketopiperazines from the Marine Derived Endophytic Aspergillus versicolor DY180635

Marine Drugs ◽  
2020 ◽  
Vol 18 (7) ◽  
pp. 338
Author(s):  
Yi Ding ◽  
Xiaojing Zhu ◽  
Liling Hao ◽  
Mengyao Zhao ◽  
Qiang Hua ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
High Resolution Mass Spectrometry ◽  
Virus Disease ◽  
Aspergillus Versicolor ◽  
Solid Culture ◽  
Resolution Mass

Four new indolyl diketopiperazines, aspamides A–E (1–4) and two new diketopiperazines, aspamides F–G (5–6), along with 11 known diketopiperazines and intermediates were isolated from the solid culture of Aspergillus versicolor, which is an endophyte with the sea crab (Chiromantes haematocheir). Further chiral high-performance liquid chromatography resolution gave enantiomers (+)- and (−)-4, respectively. The structures and absolute configurations of compounds 1–6 were determined by the comprehensive analyses of nuclear magnetic resonance (NMR), high-resolution mass spectrometry (HR-MS), and electronic circular dichroism (ECD) calculation. All isolated compounds were selected for the virtual screening on the coronavirus 3-chymoretpsin-like protease (Mpro) of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), and the docking scores of compounds 1–2, 5, 6, 8 and 17 were top among all screened molecules, may be helpful in fighting with Corona Virus Disease-19 (COVID-19) after further studies.

Synthesis of 1,2,3-triazole-substituted 6,7-dihydroindolizin-8(5H)-one derivatives mediated by Selectfluor

2019 ◽  
Vol 43 (5-6) ◽  
pp. 179-183
Author(s):  
Yulin Huang ◽  
Jiaying Lei ◽  
Xinliang Fu ◽  
Wenlin Xie ◽  
Xiaofang Li
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Resolution ◽  
High Resolution Mass Spectrometry ◽  
Crystallographic Analysis ◽  
X Ray ◽  
High Resolution Mass ◽  
Moderate Yield ◽  
Resolution Mass

The 1,2,3-triazole and 1 H-1,2,3-benzotriazole-substituted 6,7-dihydroindolizin-8(5 H)-one derivatives were synthesized by the reaction of ( E)-7-(arylmethylidene)-6,7-dihydroindolizin-8(5 H)-ones with 1,2,3-triazole and 1 H-1,2,3-benzotriazole in the presence of Selectfluor in moderate yield. The structures of all the products were characterized thoroughly by nuclear magnetic resonance, infrared, and high-resolution mass spectrometry together with X-ray crystallographic analysis.

scholarly journals Neo-Aplysiatoxin A Isolated from Okinawan Cyanobacterium Moorea Producens

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 457 ◽  
Author(s):  
Mioko Kawaguchi ◽  
Masayuki Satake ◽  
Bo-Tao Zhang ◽  
Yue-Yun Xiao ◽  
Masayuki Fukuoka ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Growth Inhibition ◽  
Spectroscopic Data ◽  
High Resolution Mass Spectrometry ◽  
High Resolution Mass ◽  
Resolution Mass ◽  
Nuclear Magnetic

A new aplysiatoxin derivative, neo-aplysiatoxin A (1), along with seven known compounds, neo-debromoaplysiatoxin A (2), dolastatin 3 (3), lyngbic acid (4), malyngamide M (5), hermitamide A (6), (−)-loliolide (7), and (+)-epiloliolide (8), was isolated from the Okinawan cyanobacterium Moorea producens. Their structures were elucidated on the basis of spectroscopic data, including high-resolution mass spectrometry and nuclear magnetic resonance. The compounds were evaluated for cytotoxic and diatom growth inhibition activities.

scholarly journals 6,6′-{[Ethane-1,2-diylbis(azaneylylidene)]bis(methaneylylidene)}bis[2-(hexyloxy)phenolato] Nickel(II)

Molbank ◽  
10.3390/m1174 ◽  
2020 ◽  
Vol 2020 (4) ◽  
pp. M1174
Author(s):  
Daniil A. Lukyanov ◽  
Anna S. Borisova ◽  
Oleg V. Levin
Keyword(s):  
Crystal Structure ◽  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
High Resolution Mass Spectrometry ◽  
Nickel Complexes ◽  
Polar Solvents ◽  
13C Nuclear Magnetic Resonance ◽  
Wide Range ◽  
Resolution Mass

Polymeric nickel complexes of salen ligands meet a wide range of applications in catalysis and electrochemistry. Because these polymers usually form very rigid films, the introduction of the conformationally flexible fragments in the corresponding monomers favors the amorphization and, thus, the mass transport. Herein we report a preparation of the hexyloxy-substituted monomeric NiSalen complex by the direct alkylation of the hydroxy-substituted complex. The resulting product was characterized by the 1H and 13C nuclear magnetic resonance (NMR), ESI-high resolution mass spectrometry (ESI-HRMS, and Fourier-transform infrared spectroscopy (FTIR). The crystal structure of the product was examined by an XRD, indicating the formation of the solvate with dichloromethane. The obtained product was found to be highly soluble in non-polar solvents, in contrast to typical NiSalens.

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