Structure of the compound purported to be NN-bis(chloromethyldimethylsilyl)-acetamide: X-ray crystal structure analysis of the novel five-membered oxygen-, silicon-, and nitrogen-containing heterocycle (O–Si)-chloro-[(N-chlorodimethylsilylacetamido)methyl]dimethylsilane

1978 ◽  
pp. 209-210 ◽  
Author(s):  
Kay D. Onan ◽  
Andrew T. McPhail ◽  
Claude H. Yoder ◽  
Raymond W. Hillyard
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
The Novel ◽  
X Ray

X-Ray Crystal Structure Analysis of Deacetyldehydroeuphorianin: The Correct Structure of the Novel Pentacyclic Macrocyclic Diterpene, Euphorianin

1987 ◽  
Vol 42 (2) ◽  
pp. 243-247 ◽  
Author(s):  
Joseph I. Okogun ◽  
Christopher O. Fakunle ◽  
Donald E. U. Ekong ◽  
Hans J. Lindner ◽  
Gerhard G. Habermehl
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
The Novel ◽  
X Ray ◽  
Correct Structure

Abstract The conversion of euphorianin to deacetyldehydroeuphorianin which was used in an X-ray crystal structure analysis is described. A new pentacyclic structure related to ingol tetraacetate is described for euphorianin.

Stereoselectivity during a Dieckmann Analogous Cyclization of (Piperazin-2-yl)propionic Acid Esters

2005 ◽  
Vol 60 (10) ◽  
pp. 1068-1070 ◽  
Author(s):  
Christian Geiger ◽  
Christel Zelenka ◽  
Roland Fröhlich ◽  
Birgit Wibbeling ◽  
Bernhard Wünsch
Keyword(s):  
Crystal Structure ◽  
Propionic Acid ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
The Novel ◽  
Cyclization Product ◽  
X Ray ◽  
Acid Esters

The primary Dieckmann cyclization product of the methyl (3,6-dioxopiperazin-2-yl)propionate was trapped with chlorotrimethylsilane and recrystallized. The X-ray crystal structure analysis showed (S)-configuration of the novel chiral centre. This configuration supports the hypothesis that formation of the stable lithium chelate is responsible for shifting this unusual Dieckmann cyclization towards the bicyclic product.

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
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