Constituents of Endiandra species. V. 2-[3',5'-Dioxo-4'-phenyl-10'-{(E,E)-5''-phenyl-penta-2'',4''-dien-1''-yl}-2',4',6'-triazatetracyclo[5,4,2,02,6,08,11]tridec12'-en-9'-yl]-acetic acid derived from Endiandra introrsa (Lauraceae)

1983 ◽  
Vol 36 (3) ◽  
pp. 627 ◽  
Author(s):  
JE Banfield ◽  
DSC Black ◽  
GD Fallon ◽  
BM Gatehouse
Keyword(s):  
Acetic Acid ◽  
Title Compound ◽  
Mother Liquor ◽  
Crystallographic Analysis ◽  
X Ray ◽  
Naturally Occurring

The structure (9) of the title compound, obtained by treatment of the mother liquor from recrystallization of the naturally occurring acid (6a) with 4-phenyl-1,2,4-triazoline-3,5-dione, has been elucidated by X-ray crystallographic analysis.

Systhesis, Characterization and Spectroscopic Properties of (2E,6E)-2,6-Bis(2,3,4-tri-methoxy-benzylidene)cyclohexanone

2011 ◽  
Vol 396-398 ◽  
pp. 2338-2341
Author(s):  
Xing Chuan Wei ◽  
Zhi Li Liu ◽  
Kun Zhang ◽  
Zhi Yun Du ◽  
Xi Zheng
Keyword(s):  
Crystal Structure ◽  
Acetic Acid ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Spectroscopic Properties ◽  
Spectral Studies ◽  
Double Bonds ◽  
X Ray ◽  
Π Interactions ◽  
X Ray Crystallography

In this paper, (2E,6E)-2,6-Bis(2,3,4-tri-methoxy -benzylidene)cyclohexanone (omitted as tmbcho) (1) was obtained by the reaction of acetic acid, tetrahydrofuran, cyclohexanone and 2,3,4-tri-methoxy-benzaldehyde. Three non-classic hydrogen bonds were observed in the compound. X-ray crystallography shows that the crystal structure is stabilized by intermolecular C-H•••π interactions and it contains plenty of conjugated double bonds. The title compound was characterized by UV-vis and fluorescent spectral studies.

The Meisenheimer rearrangement in heterocyclic synthesis. II. Synthesis and X-ray crystal structure of a tetrahydro-1H-2,3-benzoxazocine and preparation of a hexahydro-2,3-benzoxazonine

1980 ◽  
Vol 33 (6) ◽  
pp. 1323 ◽  
Author(s):  
JB Bremner ◽  
EJ Browne ◽  
PE Davies ◽  
CLWAH Raston
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Acetic Acid ◽  
Crystal And Molecular Structure ◽  
Phosphorus Oxychloride ◽  
Crystallographic Analysis ◽  
Heterocyclic Synthesis ◽  
Reaction Conditions ◽  
X Ray ◽  
Heterocyclic Derivatives

The heterocyclic derivatives, 8,9-dimethoxy-3-methyl-1-phenyl-3,4,5,6- tetrahydro-1H-2,3-benzoxazocine(3a) and 9,10-dimethoxy-3-methyl-1- phenyl-1,3,4,5,6,7-hexahydro-2,3-benzoxazonine (3b),examples of two new ring systems, have been prepared by Meisenheimer rearrangement of the corresponding 2-benzazepine and 2-benzazocine N-oxide derivatives (2a) and (2b). The Bischler-Napieralski-type cyclization reaction was used in the preparation of the tertiary amine precursors of these N-oxides reaction conditions for the cyclization were critical and phosphorus oxychloride in refluxing butanenitrile was found to give the best yields of the seven- or eight-membered cyclic imine intermediates. Reductive cleavage of the benzoxazocine derivative (3a) with zinc in acetic acid followed by N-methylation gave the expected product, [2-{3- (dimethylamino)propyl}-4,5-di-methoxyphenyl]phenylmethanol (12). The crystal and molecular structure of (3a) has been determined by X-ray crystallographic analysis.

A Novel Alkali-Metal Hydrido-tris(pyrazolyl)borate (Tp*) Complex. Isolation and Crystal Structure of [(Me2CO)3(NaTp*)2]

2014 ◽  
Vol 69 (7) ◽  
pp. 793-798
Author(s):  
Laurent Plasseraud ◽  
Hélène Cattey
Keyword(s):  
Crystal Structure ◽  
Alkali Metal ◽  
Sodium Hydroxide ◽  
Title Compound ◽  
Room Temperature ◽  
Crystallographic Analysis ◽  
Monoclinic Space Group ◽  
Large Excess ◽  
X Ray ◽  
Acetone Water

The title compound was isolated from the treatment of Tp*Sn(Cl)2Bu (1) with a large excess of sodium hydroxide in a mixture of acetone-water at room temperature. [(Me2CO)3(NaTp*)2] (2) crystallizes at 4 °C as prismatic colorless crystals, in the monoclinic space group P21/c with Z = 4, a = 12.2837(6), b = 24.3197(12), c = 16.9547(8) Å, β = 110.017(1)°, and V = 4759.0(4) Å3. The X-ray crystallographic analysis revealed a dinuclear unit in which two Tp*Na moieties are held together by three bridging acetone molecules acting as oxygen-based donors.

scholarly journals Highly Substituted Benzophenone Aldehydes and Eremophilane Derivatives from the Deep-Sea Derived Fungus Phomopsis lithocarpus FS508

Marine Drugs ◽  
2018 ◽  
Vol 16 (9) ◽  
pp. 329 ◽  
Author(s):  
Jian-Lin Xu ◽  
Hong-Xin Liu ◽  
Yu-Chan Chen ◽  
Hai-Bo Tan ◽  
Heng Guo ◽  
...  
Keyword(s):  
Cytotoxic Activity ◽  
Cell Lines ◽  
A549 Cell ◽  
Marine Sediment ◽  
Deep Sea ◽  
Crystallographic Analysis ◽  
X Ray ◽  
Naturally Occurring ◽  
Ic50 Values ◽  
New Compounds

Five new benzophenone derivatives named tenellones D–H (1–5), sharing a rare naturally occurring aldehyde functionality in this family, and a new eremophilane derivative named lithocarin A (7), together with two known compounds (6 and 8), were isolated from the deep marine sediment-derived fungus Phomopsis lithocarpus FS508. All of the structures for these new compounds were fully characterized and established on the basis of extensive spectroscopic interpretation and X-ray crystallographic analysis. Compound 5 exhibited cytotoxic activity against HepG-2 and A549 cell lines with IC50 values of 16.0 and 17.6 μM, respectively.

The Crystal Structure of Dimethyl (1aα,2aα,5β,6aβ-Hexahydroazirino[2,1-b]benzoxazole-1a, 5(1H)-dicarboxylate

1991 ◽  
Vol 44 (8) ◽  
pp. 1145 ◽  
Author(s):  
MF Mackay ◽  
M Campbell ◽  
MJ Mcleish
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Crystallographic Analysis ◽  
Aminobenzoic Acid ◽  
X Ray ◽  
Relative Stereochemistry

The title compound formed the major component in a rearrangement of an analogue of 4-amino-4-deoxychorismic acid (1), an intermediate in the chorismate-p-aminobenzoic acid biotransformation. X-Ray crystallographic analysis has defined the relative stereochemistry at the four chiral centres in the tricyclic molecule.

scholarly journals 10H-Pyrazino[2,3-b][1,4]benzotellurazine, a Novel Tellurium-Containing Heterocyclic System

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
Diamond S. Smith ◽  
Dallas N. Alexis ◽  
Frank R. Fronczek ◽  
Thomas Junk
Keyword(s):  
Title Compound ◽  
Heterocyclic System ◽  
Crystallographic Analysis ◽  
Supramolecular Assemblies ◽  
Methyl Derivative ◽  
X Ray ◽  
Hydrogen Bonded

Condensation of 2,3-dichloropyrazine with 2-aminobenzenetellurole and 2-amino-5-methylbenzenetellurole, generated in situ by reduction of the corresponding ditellurides, resulted in the formation of novel 10H-pyrazino[2,3-b][1,4]benzotellurazine and its 7-methyl derivative. The products were purified via their well-crystallized 5,5-dibromo derivatives. X-ray crystallographic analysis of the title compound indicates that it has a pronounced V-shape and forms hydrogen-bonded dimers. Te, N-containing heterocycles have the potential of offering access to supramolecular assemblies.

scholarly journals 2-Deoxy-2-fluoro-2-C-methyl-D-ribono-1,4-lactone (fluoromethylrib)

2006 ◽  
Vol 62 (4) ◽  
pp. o1208-o1210
Author(s):  
Samuel Parker ◽  
David Watkin ◽  
Benjamin Mayes ◽  
Richard Storer ◽  
Sarah Jenkinson ◽  
...  
Keyword(s):  
Title Compound ◽  
Crystallographic Analysis ◽  
Ring Size ◽  
X Ray ◽  
Compound C ◽  
Relative Stereochemistry

The relative stereochemistry of the fluoro substituent (as ribo) and the ring size of the lactone (as five) in the title compound, C6H9FO4, have been established by X-ray crystallographic analysis.

Constituents of Endiandra species. I. Endiandric acid, a novel carboxylic acid from Endiandra introrsa (Lauraceae), and a derived lactone

1981 ◽  
Vol 34 (8) ◽  
pp. 1655 ◽  
Author(s):  
WM Bandaranayake ◽  
JE Banfield ◽  
DSC Black ◽  
GD Fallon ◽  
BM Gatehouse
Keyword(s):  
Acetic Acid ◽  
Carboxylic Acid ◽  
Crystallographic Analysis ◽  
X Ray

X-ray crystallographic analysis shows that endiandric acid and a derived lactone have the respective structures 2-(6'- phenyltetracyclo[5,4,2,03,13,010,12]trideca-4',8'-dien-11'-yl)acetic acid and 12-phenyl-3-oxapentacyclo[7,5,2,02,6,07,15,013,16]hexadecan-4-one.

Gelsevirine hydrochloride

2007 ◽  
Vol 63 (3) ◽  
pp. o1369-o1371
Author(s):  
Hai-Bin Han ◽  
Zhong Yuan ◽  
Kai Xiao ◽  
Min-Qin Chen ◽  
Liming Zhang
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Folk Medicine ◽  
Indole Alkaloid ◽  
Crystallographic Analysis ◽  
Terpenoid Indole Alkaloid ◽  
X Ray ◽  
Compound C

At 293 K, a crystalline terpenoid indole alkaloid, the title compound, C21H25N2O3 +·Cl−, has been isolated from Gelsemium elegans Benth, a Chinese folk medicine plant. Structural ambiguities have been resolved by the X-ray crystallographic analysis. Intramolecular C—H...O and intermolecular C—H...Cl, C—H...O and N—H...Cl hydrogen bonds help to stabilize the structure.

Stereoselective Synthesis of (±)-(cis-6-Methyltetrahydropyran-2-yl)acetic Acid

1994 ◽  
Vol 47 (9) ◽  
pp. 1735 ◽  
Author(s):  
P Varelis ◽  
AJ Graham ◽  
BL Johnson ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Acetic Acid ◽  
Single Crystal ◽  
Title Compound ◽  
Stereoselective Synthesis ◽  
Relative Configuration ◽  
X Ray

The title compound (1) has been synthesized in seven steps and in 42% overall yield from the nucleophilic diene (2). The relative configuration of (1) has been confirmed by a single-crystal X-ray study.

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