Reaction Mechanism Based on X-ray Crystal Structure Analysis during the Solid-State Polymerization of Muconic Esters

2007 ◽  
Vol 40 (17) ◽  
pp. 6048-6056 ◽  
Author(s):  
Daisuke Furukawa ◽  
Akikazu Matsumoto
Keyword(s):  
Crystal Structure ◽  
Reaction Mechanism ◽  
Solid State ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
X Ray ◽  
Solid State Polymerization

Complexes of N-Aryltriphenylphosphinimines with Mercury(II) Halides

1999 ◽  
Vol 54 (7) ◽  
pp. 858-862 ◽  
Author(s):  
Thomas P. Braun ◽  
Paul A. Gutsch ◽  
Hans Zimmer
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Structure Analysis ◽  
Nmr Spectra ◽  
Crystal Structure Analysis ◽  
Phosphonium Salts ◽  
X Ray

The synthesis, IR and 31P NMR spectra of the complexes of various N-aryltriphenylphosphinimines with some mercury dihalides as well as the corresponding phosphonium salts are reported. It is shown by an X-ray crystal structure analysis of the complex of the unsubstituted phosphinimine with HgCl2 that in the solid state these complexes form dimers via two Hg ∙∙∙ μ2- Cl ∙∙∙ Hg bridges.

1,3-Dipolar [3+3] Cycloaddition of 1,4-Benzodiazepinone-Based Nitrones with α-Halohydroxamates for Diastereoselective Synthesis of Novel d-Edge Heterocycle-Fused 1,4-Benzodiazepinones

Synlett ◽  
2021 ◽  
Author(s):  
Hong-Wu Zhao ◽  
Heng Zhang ◽  
Lu-Yu Cai ◽  
Zhe Tang ◽  
Xiao-Zu Fan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Reaction Mechanism ◽  
Single Crystal ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Diastereoselective Synthesis ◽  
Reaction Conditions ◽  
Relative Configuration ◽  
X Ray ◽  
Single Crystal Structure Analysis

Promoted by K2CO3 (2.0 equiv), the 1,3-dipolar [3+3] cycloaddition between 1, 4-benzodiazepinone-based nitrones and α-halohydroxamates processed smoothly under the mild reaction conditions and delivered structurally novel and complex cis or trans-configured d-edge-heterocycle-fused 1,4-benzodiazepinones in up to >99% isolated yield with >20:1 dr. The relative configuration of the title chemical entities was clearly identified with the use of X-ray single crystal structure analysis. The reaction mechanism was assumed to interpret the diastereoselective production of the obtained cis or trans-configured d-edge-heterocycle-fused 1, 4-benzodiazepinones.

Diastereoselective synthesis of spiropyrazolones via 1,3-dipolar [3+2] cycloadditions between pyrazolone-based olefins and N, N’-cyclic azomethine imines

Synlett ◽  
2021 ◽  
Author(s):  
Hong-Wu Zhao ◽  
Zhe Tang ◽  
Hui-Hui Wu ◽  
Xiao-Zu Fan ◽  
Heng Zhang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Reaction Mechanism ◽  
Single Crystal ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Diastereoselective Synthesis ◽  
X Ray ◽  
Stereochemical Configuration ◽  
Azomethine Imines ◽  
Single Crystal Structure Analysis

Under the catalysis of PhCO2H, the 1,3-dipolar [3+2] cycloaddition between pyrazolone-based olefins and N, N’-cyclic azomethine imines proceeded readily, thus delivering structurally novel spiropyrazolones with up to 98% yield and >20:1 dr. The relative stereochemical configuration of the obtained spiropyrazolones was unambiguously assigned by X-ray single crystal structure analysis. The diastereoselective formation of the title spiropyrazolones was interpreted by the hypothesized reaction mechanism.

scholarly journals Synthesis and Solid-state Structures of 1,3- and 1,4-Bis(diethylgallyl) benzene

2009 ◽  
Vol 64 (11-12) ◽  
pp. 1375-1380
Author(s):  
Joseph Izundu ◽  
Peter Jutzi ◽  
Beate Neumann ◽  
Henning Sielemann ◽  
Hans-Georg Stammler
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Structural Studies ◽  
X Ray ◽  
Coordination Behavior ◽  
Redistribution Reactions ◽  
Solid State Structures

The compounds 1,3-bis(diethylgallyl)benzene (3) and 1,4- bis(diethylgallyl)benzene (6) were prepared by reaction of the corresponding chloromercuriobenzenes with an excess of triethylgallium by applying pressure and higher temperatures. These compounds very easily undergo redistribution reactions in solution and in the solid state. Extremely air-sensitive crystals suitable for an X-ray crystal structure analysis were obtained from triethylgallium as solvent. The structural studies revealed the presence of tetra-coordinated carbon and gallium atoms in symmetric aryl-diethylgallyl bridging units. The coordination behavior of 3 and 6 in the solid state is quite different from that of the corresponding methyl-substituted compounds

Solution and solid-state fluorescence of 2-(2′-hydroxyphenyl)-1,5-benzodiazepin-2-one (HBD) borate complexes

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86352-86360 ◽  
Author(s):  
Hasan Mtiraoui ◽  
Rafik Gharbi ◽  
Moncef Msaddek ◽  
Yann Bretonnière ◽  
Chantal Andraud ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Ir Spectroscopy ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
X Ray ◽  
New Family ◽  
Borate Complexes ◽  
Solid State Fluorescence

A new family of fluorescent 1,5-benzodiazepin-2-one (HBD) borate complexes was prepared in good yields, and fully characterized by means of MS, NMR and IR spectroscopy, as well as X-ray crystal structure analysis for compound 13.

scholarly journals Preparative-scale HPLC Resolution of Metallacyclic η3-Allyltricarbonyliron Complexes and Determination of the Absolute Configuration by X-Ray Crystal Structure Analysis

1999 ◽  
Vol 23 (9) ◽  
pp. 578-579
Author(s):  
Rainer Schobert ◽  
Hermann Pfab ◽  
Jutta Böhmer ◽  
Frank Hampel ◽  
Andreas Werner
Keyword(s):  
Crystal Structure ◽  
Silica Gel ◽  
Structure Analysis ◽  
Absolute Configuration ◽  
Crystal Structure Analysis ◽  
Preparative Scale ◽  
X Ray ◽  
The Absolute

Racemates of (η3-allyl)tricarbonyliron lactone complex Fe(CO)3{η1:η3-C(O)XCH2CHCMeCH2} 1a (X = O) and (η3-allyl)tricarbonyliron lactam complex 2a (X = NMe) are resolved on a preparative scale by HPLC on cellulose tris(3,5-dimethylphenyl)carbamate/silica gel RP-8 and the absolute configuration of (-)-2a is determined by X-ray crystal structure analysis.

Second-Generation Inhibitors for the Metalloprotease Neprilysin Based on Bicyclic Heteroaromatic Scaffolds: Synthesis, Biological Activity, and X-Ray Crystal-Structure Analysis

2005 ◽  
Vol 88 (4) ◽  
pp. 731-750 ◽  
Author(s):  
Stefan Sahli ◽  
Brian Frank ◽  
W. Bernd Schweizer ◽  
François Diederich ◽  
Denise Blum-Kaelin ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Biological Activity ◽  
Structure Analysis ◽  
Second Generation ◽  
Crystal Structure Analysis ◽  
X Ray
Sign in / Sign up

Export Citation Format

Share Document