scholarly journals Meroterpenoids and Isocoumarinoids from a Myrothecium Fungus Associated with Apocynum venetum

Marine Drugs ◽  
2018 ◽  
Vol 16 (10) ◽  
pp. 363 ◽  
Author(s):  
Yanchao Xu ◽  
Cong Wang ◽  
Haishan Liu ◽  
Guoliang Zhu ◽  
Peng Fu ◽  
...  
Keyword(s):  
Medicinal Plant ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Spectroscopic Analysis ◽  
X Ray ◽  
X Ray Crystallography ◽  
Apocynum Venetum ◽  
Ic50 Values

Four new meroterpenoids 1–4 and four new isocoumarinoids 5–8, along with five known isocoumarinoids (9–13), were isolated from the fungus Myrothecium sp. OUCMDZ-2784 associated with the salt-resistant medicinal plant, Apocynum venetum (Apocynaceae). Their structures were elucidated by means of spectroscopic analysis, X-ray crystallography, ECD spectra and quantum chemical calculations. Compounds 1–5, 7, 9 and 10 showed weak α-glucosidase inhibition with the IC50 values of 0.50, 0.66, 0.058, 0.20, 0.32, 0.036, 0.026 and 0.37 mM, respectively.

The synergy of different solid-state techniques to elucidate the supramolecular assembly of two 1H-benzotriazole polymorphs

2019 ◽  
Vol 21 (36) ◽  
pp. 19879-19889
Author(s):  
María Mar Quesada-Moreno ◽  
Juan Ramón Avilés-Moreno ◽  
Juan Jesús López-González ◽  
Fco. Javier Zúñiga ◽  
Dolores Santa María ◽  
...  
Keyword(s):  
Solid State ◽  
Quantum Chemical Calculations ◽  
Absolute Configuration ◽  
Quantum Chemical ◽  
Supramolecular Structure ◽  
Supramolecular Assembly ◽  
X Ray ◽  
X Ray Crystallography ◽  
The Absolute

4aα (chiral) and 4aβ (achiral) polymorphs of 1H-benzotriazole are studied by X-ray crystallography, SSNMR, IR, Raman, VCD, and quantum chemical calculations. The absolute configuration of the supramolecular structure of 4aα polymorph is determined.

Relationship between structure and photoinitiating abilities of selected bromide salts of 2-oxo-2,3-dihydro-1H-imidazo[1,2-a]pyridine (IMP): influence of the solvent and the substitution in benzaldehyde on the course of its reaction with IMP

2006 ◽  
Vol 62 (1) ◽  
pp. 135-142 ◽  
Author(s):  
Agnieszka Plutecka ◽  
Marcin Hoffmann ◽  
Urszula Rychlewska ◽  
Zdzisław Kucybała ◽  
Jerzy Pączkowski ◽  
...  
Keyword(s):  
Free Radical ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Imidazole Ring ◽  
Aprotic Solvents ◽  
Pyridinium Bromide ◽  
X Ray ◽  
X Ray Crystallography ◽  
Theoretical Results ◽  
Dipolar Aprotic Solvents

2-Oxo-2,3-dihydro-1H-imidazo[1,2-a]pyridinium bromide and its C3-substituted derivatives have been synthesized and structurally characterized by X-ray crystallography and quantum chemical calculations. Their potential as photoinitiators for free-radical polymerization has been investigated experimentally and compared with theoretical results. It has been established that the course of the reaction that introduces the substituted benzylidene group to the imidazole ring is different in the protic and dipolar aprotic solvents, and also depends on the character of the substituent, as the energy change in the reaction favours either R 1 R 2C=CHR 3 or R 1 R 2CH—CH(OCH3)R 3 formation.

scholarly journals HPLC-DAD-Guided Isolation of Diversified Chaetoglobosins from the Coral-Associated Fungus Chaetomium globosum C2F17

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1237 ◽  
Author(s):  
Xiao-Wei Luo ◽  
Cheng-Hai Gao ◽  
Hu-Mu Lu ◽  
Jia-Min Wang ◽  
Zi-Qi Su ◽  
...  
Keyword(s):  
Single Crystal ◽  
Cell Lines ◽  
Cancer Cell ◽  
Spectroscopic Analysis ◽  
Chaetomium Globosum ◽  
X Ray ◽  
X Ray Crystallography ◽  
Ic50 Values ◽  
First Time ◽  
Mcf 7

Cytochalasans have continuously aroused considerable attention among the chemistry and pharmacology communities due to their structural complexities and pharmacological significances. Sixteen structurally diverse chaetoglobosins, 10-(indol-3-yl)-[13]cytochalasans, including a new one, 6-O-methyl-chaetoglobosin Q (1), were isolated from the coral-associated fungus Chaetomium globosum C2F17. Their structures were accomplished by extensive spectroscopic analysis combined with single-crystal X-ray crystallography and ECD calculations. Meanwhile, the structures and absolute configurations of the previously reported compounds 6, 12, and 13 were confirmed by single-crystal X-ray analysis for the first time. Chaetoglobosins E (6) and Fex (11) showed significant cytotoxicity against a panel of cancer cell lines, K562, A549, Huh7, H1975, MCF-7, U937, BGC823, HL60, Hela, and MOLT-4, with the IC50 values ranging from 1.4 μM to 9.2 μM.

Direct arylation of heteroarenes by PEPPSI-type palladium–NHC complexes and representative quantum chemical calculations for the compound which the structure was determined by X-ray crystallography

2019 ◽  
Vol 72 (19-21) ◽  
pp. 3258-3284
Author(s):  
Neslihan Şahin ◽  
Goncagül Serdaroğlu ◽  
Serpil Demir Düşünceli ◽  
Muhammad Navaz Tahir ◽  
Cengiz Arıcı ◽  
...  
Keyword(s):  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Direct Arylation ◽  
X Ray ◽  
X Ray Crystallography

scholarly journals Fusarins G–L with Inhibition of NO in RAW264.7 from Marine-Derived Fungus Fusarium solani 7227

Marine Drugs ◽  
2021 ◽  
Vol 19 (6) ◽  
pp. 305
Author(s):  
Guangyuan Luo ◽  
Li Zheng ◽  
Qilin Wu ◽  
Senhua Chen ◽  
Jing Li ◽  
...  
Keyword(s):  
Fusarium Solani ◽  
2D Nmr ◽  
Inflammatory Activity ◽  
Raw264.7 Cells ◽  
Spectroscopic Methods ◽  
X Ray ◽  
X Ray Crystallography ◽  
Structure Activity ◽  
Ic50 Values ◽  
New Compounds

Six new fusarin derivatives, fusarins G–L (1–6), together with five known compounds (5–11) were isolated from the marine-derived fungus Fusarium solani 7227. The structures of the new compounds were elucidated by means of comprehensive spectroscopic methods (1D and 2D NMR, HRESIMS, ECD, and ORC) and X-ray crystallography. Compounds 5–11 exhibited potent anti-inflammatory activity by inhibiting the production of NO in RAW264.7 cells activated by lipopolysaccharide, with IC50 values ranging from 3.6 to 32.2 μM. The structure–activity relationships of the fusarins are discussed herein.

Sign in / Sign up

Export Citation Format

Share Document