scholarly journals Determination of the absolute configuration of (+)-neopentyl-1-d alcohol by neutron and x-ray diffraction analysis.

1994 ◽  
Vol 91 (26) ◽  
pp. 12872-12876 ◽  
Author(s):  
H. S. Yuan ◽  
R. C. Stevens ◽  
R. Bau ◽  
H. S. Mosher ◽  
T. F. Koetzle
Keyword(s):  
Diffraction Analysis ◽  
Absolute Configuration ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Absolute

Structure of laserolide and isolaserolide: Revision of constitution and determination of relative and absolute configuration

1985 ◽  
Vol 50 (8) ◽  
pp. 1878-1887 ◽  
Author(s):  
Miroslav Holub ◽  
Miloš Buděšínský ◽  
Zdenka Smítalová ◽  
David Šaman ◽  
Urszula Rychłewska
Keyword(s):  
Diffraction Analysis ◽  
Absolute Configuration ◽  
Cd Spectroscopy ◽  
X Ray Diffraction ◽  
Physical Methods ◽  
X Ray

The position of the ester groups in sesquiterpenic lactones laserolide (I) and isolaserolide (II) has been revised and its relative and absolute configuration determined by chemical and physical methods (NMR and CD spectroscopy). The structure I was confirmed by X-ray diffraction analysis. Laserolide (I) is the first germacranolide found in the Umbelliferae family, isolaserolide (II) is the first representative of new stereostructural group of elemanolides - 5βH,6αH,7αH,10αCH3-elema-1,3-dien-6,12-olides.

scholarly journals Diastereoselective Addition of Diazomethane to Zaluzanin A

2014 ◽  
Vol 9 (6) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Adriana Ortiz-León ◽  
J. Martín Torres-Valencia ◽  
J. Jesús Manríquez-Torres ◽  
José G. Alvarado-Rodríguez ◽  
Uvaldo Hernández-Balderas ◽  
...  
Keyword(s):  
Diffraction Analysis ◽  
Absolute Configuration ◽  
Sesquiterpene Lactones ◽  
Addition Product ◽  
Vibrational Circular Dichroism ◽  
X Ray Diffraction ◽  
X Ray ◽  
H Nmr ◽  
Diastereoselective Addition ◽  
The Absolute

The diastereoselectivity of diazomethane addition to the conjugated double bond of α,β-unsaturated sesquiterpene lactones was explored using zaluzanin A (1) as a model. Thus, the absolute configuration of 1 was assured by X-ray diffraction analysis including evaluation of Flack and Hooft parameters, and by vibrational circular dichroism spectroscopy of its diacetyl derivative 2, while the absolute configuration of the diazomethane addition product, zaluzanin A pyrazoline (3), was determined by evaluation of the 1H NMR chemical shift changes with respect to 1, and confirmed by X-ray diffraction analysis, again including evaluation of Flack and Hooft parameters.

Determination of the absolute configuration of 1,1′-binaphthyl and its derivatives by x-ray diffraction

1968 ◽  
Vol 9 (1) ◽  
pp. 97-102 ◽  
Author(s):  
Hiroshi Akimoto ◽  
Takayuki Shioiri ◽  
Yoichi Iitaka ◽  
Shun-ichi Yamada
Keyword(s):  
Absolute Configuration ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Absolute

Glycosylcarborane derivatives and the determination of the absolute configuration of a diastereomeric triol from x-ray diffraction

1990 ◽  
Vol 55 (3) ◽  
pp. 838-843 ◽  
Author(s):  
Julie L. Maurer ◽  
Fabienne Berchier ◽  
Anthony J. Serino ◽  
Carolyn B. Knobler ◽  
M. Frederick Hawthorne
Keyword(s):  
Absolute Configuration ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Absolute

Confirmation of the absolute configuration of Stachybotrin C using single-crystal X-ray diffraction analysis of its 4-bromobenzyl ether derivative

2018 ◽  
Vol 71 (6) ◽  
pp. 584-591 ◽  
Author(s):  
Yu Kuroda ◽  
Keiko Hasegawa ◽  
Keiichi Noguchi ◽  
Kazuhiro Chiba ◽  
Keiji Hasumi ◽  
...  
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Absolute Configuration ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ether Derivative ◽  
The Absolute

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.

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