Pigments of Fungi. LVII. Structure and X-Ray Crystallographic Analysis of Dermocanarin 10, a New Naphthalene - Dihydroanthracenone Dimer from an Australian Dermocybe Toadstool

1999 ◽  
Vol 52 (9) ◽  
pp. 881 ◽  
Author(s):  
Melvyn Gill ◽  
Petra M. Millar ◽  
Evelin Raudies ◽  
Somphone Phonh-Axa ◽  
Jonathan M. White ◽  
...  
Keyword(s):  
Single Crystal ◽  
Structure Analysis ◽  
Spectroscopic Data ◽  
Crystallographic Analysis ◽  
Fungal Metabolite ◽  
X Ray ◽  
Absolute Stereochemistry

The structure and absolute stereochemistry of the fungal metabolite dermocanarin 10 (2), which differs from all previous members of the dermocanarin group by virtue of the connectivity between the anthraquinone and dimethoxynaphthol rings, is deduced from spectroscopic data and confirmed by a single-crystal X-ray structure analysis.

Revised Absolute Configurations of Latifolic Acid and the Pyrrolizidine Alkaloid Latifoline

1988 ◽  
Vol 41 (11) ◽  
pp. 1781 ◽  
Author(s):  
JN Roitman ◽  
RY Wong
Keyword(s):  
Carboxylic Acid ◽  
Single Crystal ◽  
Pyrrolizidine Alkaloid ◽  
Crystallographic Analysis ◽  
Side Chain ◽  
X Ray ◽  
The Absolute ◽  
Absolute Stereochemistry

The absolute stereochemistry of (+)- latifolk acid has been determined by single-crystal X-ray crystallographic analysis to be (2S,3R,4R)-3- hydroxy-2,4-dimethyl-5-oxotetrahydrofuran-3-carboxylic acid. The configuration of the three chiral centres is opposite to that presently recorded in the literature. Accordingly, the configuration of the pyrrolizidine alkaloid, latifoline, which includes a latifolic acid side chain, must be revised.

scholarly journals New Cytotoxic Steroid Produced by the Soil-Derived Fungus Aspergillus flavus JDW-1

2019 ◽  
Vol 14 (5) ◽  
pp. 1934578X1985037 ◽  
Author(s):  
Wenqiang Guo ◽  
Wenjie Liu ◽  
Feng Xiao ◽  
Miaomiao Zhang ◽  
Longqiang Li ◽  
...  
Keyword(s):  
Aspergillus Flavus ◽  
Spectroscopic Data ◽  
Inhibitory Concentration ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Crystallographic Analysis ◽  
Scavenging Activity ◽  
X Ray ◽  
Hct 116 ◽  
Absolute Stereochemistry

One new steroid 1, together with seven known compounds 2 to 8, were discovered in the extract of a soil-derived fungus Aspergillus flavus JDW-1. The structure, including the absolute stereochemistry of new compound 1, was established by interpretation of extensive nuclear magnetic resonance spectroscopic data and further confirmed by X-ray crystallographic analysis. The cytotoxicity of 1 against the A-549, Hela, HCT-116, MGC-803, and HO-8910 cell lines was evaluated, which showed cytotoxicity with the half-maximal inhibitory concentration (IC50) values as 5.00 to 22.38 μM. Compounds 2 to 8 exhibited moderate radical scavenging activity against DPPH with IC50 values ranging from 4.7 to 28.5 μM.

Übergangsmetall-substituierte Diphosphene, XIV. Zur Reaktivität des Diphosphenylkomplexes (μ5-C5Me5)(CO)2Fe—P=P—Ar (Ar = 2,4,6-t-Bu3C6H2) gegenüber Schwefel, Selen und Tellur. Synthese und Struktur des ersten Thioxo-λ5-diphosphenyl-Komplexes (μ5-C5Me5)(CO)2Fe-P(=S)(=P-Ar) / Transition Metal Substituted Diphosphenes. On the Reactivity of the Diphosphenyl Complex (μ5-C5Me5)(CO)2Fe-P=P-Ar (Ar = 2,4,6-t-Bu3C6H2) towards Sulfur, Selenium, and Tellurium. Synthesis and X-Ray Structure Analysis of the First Thioxo-λ5-diphosphenyl Complex (μ5-C5Me5) (CO)2Fe - P(=S)(=P - Ar)

1988 ◽  
Vol 43 (6) ◽  
pp. 715-721 ◽  
Author(s):  
Lothar Weber ◽  
Georg Meine ◽  
Roland Boese ◽  
Norbert Niederprüm
Keyword(s):  
Molecular Structure ◽  
Transition Metal ◽  
Single Crystal ◽  
Structure Analysis ◽  
Elemental Analysis ◽  
Spectroscopic Data ◽  
Equimolar Amount ◽  
X Ray

AbstractThe diphosphenyl complex (μ5-C5Me5)(CO)2Fe-P=P-Ar (1a) (Ar = 2,4,6-tert-Bu3C6H2) reacts with an equimolar amount of sulfur to yield the first thioxo- λ5 -diphosphenyl complex (μ5-C5Me5)(CO)2Fe-P(=S)=P-Ar (2). Heating of 2 in boiling benzene affords the metal functionalized thiadiphosphirane 3. Similarily the selenoxo-λ5 -diphosphenyl complex (μ5-C5Me5)(CO)2Fe-P(=Se)=P-Ar (5) and selena-diphosphirane 6 are synthesized. The products have been characterized by elemental analysis as well as by spectroscopic data (IR, 1H, 13C, 31P NMR, MS). The molecular structure of 2 has been elucidated by single crystal X-ray analysis.

Absolute Stereochemistry of (-)-Wieland-Miescher Ketone as Established by the X-ray Crystallographic and CD Exciton Chirality Methods

1992 ◽  
Vol 57 (7) ◽  
pp. 1459-1465 ◽  
Author(s):  
Nobuyuki Harada ◽  
Tatsuo Sugioka ◽  
Hisashi Uda ◽  
Takeo Kuriki
Keyword(s):  
Structure Analysis ◽  
Absolute Configuration ◽  
X Ray ◽  
The Absolute ◽  
Absolute Stereochemistry

The 8aR absolute stereochemistry of Wieland-Miescher ketone (-)-I was established by the X-ray structure analysis of its bis(4-bromobenzoate) derivatives (1R,6R,8aR)-(+)-IV and (1R,6S,8aR)-(-)-V. The absolute configuration of (-)-I was corroborated further by the application of the CD exciton chirality method to bis(4-bromobenzoates) (+)-IV and (-)-V.

New iboga-type alkaloids from Ervatamia hainanensis

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 30277-30284 ◽  
Author(s):  
Zhi-Wen Liu ◽  
Xiao-Jun Huang ◽  
Han-Lin Xiao ◽  
Guo Liu ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Spectroscopic Data ◽  
X Ray Diffraction ◽  
X Ray

The structures and absolute configurations of seven new iboga-type alkaloids 1–7 were determined by spectroscopic data, Mosher's method, single crystal X-ray diffraction and ECD analyses.

scholarly journals Crystal Structure Analysis of the First Discovered Stability-Enhanced Solid State of Tenofovir Disoproxil Free Base Using Single Crystal X-ray Diffraction

Molecules ◽  
2017 ◽  
Vol 22 (7) ◽  
pp. 1182 ◽  
Author(s):  
Ji-Hun An ◽  
Alice Kiyonga ◽  
Woojin Yoon ◽  
Hyung Ryu ◽  
Jae-Sun Kim ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Single Crystal ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Free Base ◽  
X Ray Diffraction ◽  
X Ray

ChemInform Abstract: Single Crystal X-Ray Structure Analysis and Magnetic Properties of Ba3YRu2O9, Ba3GdRu2O9, and Ba3YbRu2O9.

ChemInform ◽  
2010 ◽  
Vol 25 (49) ◽  
pp. no-no
Author(s):  
M. RATH ◽  
HK. MUELLER-BUSCHBAUM
Keyword(s):  
Magnetic Properties ◽  
Single Crystal ◽  
Structure Analysis ◽  
X Ray

How the Magnetic Field Impacts the Chiroptical Activities of Helical Copper Enantiomers

2021 ◽  
Author(s):  
jialu wu ◽  
Bo Li ◽  
Hong Wang ◽  
Ying Zhen Lai ◽  
Yue Ye ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Solid State ◽  
Thermogravimetric Analysis ◽  
Single Crystal ◽  
Structure Analysis ◽  
Chiral Ligands ◽  
X Ray ◽  
The Magnetic Field

A pair of enantiomers {[Cu(L-pro)(L-tyr)]·2H2O}n (L-1) and {[Cu(D-pro)(D-tyr)]·2H2O}n (D-1) based on the chiral ligands L/D-proline and L/D-tyrosine were synthesized and investigated by single-crystal X-ray structure analysis, IR, thermogravimetric analysis, solid-state...

scholarly journals Arene Ruthenium Metalla-Assemblies with Anthracene Moieties for PDT Applications

Inorganics ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 97 ◽  
Author(s):  
Marie Gaschard ◽  
Farzaneh Nehzat ◽  
Thomas Cheminel ◽  
Bruno Therrien
Keyword(s):  
Molecular Structure ◽  
Single Crystal ◽  
General Formula ◽  
Structure Analysis ◽  
White Light ◽  
Light Irradiation ◽  
Synthesis And Characterization ◽  
X Ray

The synthesis and characterization of three metalla-rectangles of the general formula [Ru4(η6-p-cymene)4(μ4-clip)2(μ2-Lanthr)2][CF3SO3]4 (Lanthr: 9,10-bis(3,3’-ethynylpyridyl) anthracene; clip = oxa: oxalato; dobq: 2,5-dioxido-1,4-benzoquinonato; donq: 5,8-dioxido-1,4-naphthoquinonato) are presented. The molecular structure of the metalla-rectangle [Ru4(η6-p-cymene)4(μ4-oxa)2(μ2-Lanthr)2]4+ has been confirmed by the single-crystal X-ray structure analysis of [Ru4(η6-p-cymene)4(μ4-oxa)2(μ2-Lanthr)2][CF3SO3]4 · 4 acetone (A2 · 4 acetone), thus showing the anthracene moieties to be available for reaction with oxygen. While the formation of the endoperoxide form of Lanthr was observed in solution upon white light irradiation, the same reaction does not occur when Lanthr is part of the metalla-assemblies.

Synthesis, X-ray crystallographic analysis, and theoretical structure analysis of tetrathienylethenes designed for photo- and electrochromism

2007 ◽  
Vol 48 (47) ◽  
pp. 8338-8342 ◽  
Author(s):  
Hiroshi Ikeda ◽  
Azusa Sakai ◽  
Hayato Namai ◽  
Akinori Kawabe ◽  
Kazuhiko Mizuno
Keyword(s):  
Structure Analysis ◽  
Crystallographic Analysis ◽  
X Ray ◽  
Theoretical Structure
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