Dichlorolissoclimide fromLissoclinum voeltzkowiMichaelson (Urochordata):  Crystal Structure and Absolute Stereochemistry

1996 ◽  
Vol 59 (12) ◽  
pp. 1203-1204 ◽  
Author(s):  
Loïc Toupet ◽  
Jean-François Biard ◽  
Jean-François Verbist
Keyword(s):  
Crystal Structure ◽  
Absolute Stereochemistry

Aplysinol from : crystal structure and absolute stereochemistry

1977 ◽  
Vol 18 (35) ◽  
pp. 2998
Author(s):  
Joyce A. McMillan ◽  
Iain C. Paul ◽  
Salvatore Caccamese ◽  
Kenneth L. Rinehart
Keyword(s):  
Crystal Structure ◽  
Absolute Stereochemistry

Absolute stereochemistry of disidein and of two new related halogenated sesterterpenoids. Two-dimensional nmr studies and x-ray crystal structure

Tetrahedron ◽  
1987 ◽  
Vol 43 (20) ◽  
pp. 4777-4784 ◽  
Author(s):  
G. Cimino ◽  
S. De Rosa ◽  
S. De Stefano ◽  
R. Puliti ◽  
G. Strazzullo ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Two Dimensional ◽  
Nmr Studies ◽  
X Ray ◽  
Absolute Stereochemistry

Aplysinol from laurencia decidua: crystal structure and Absolute stereochemistry

1976 ◽  
Vol 17 (47) ◽  
pp. 4219-4222 ◽  
Author(s):  
Joyce A. McMillan ◽  
Iain C. Paul ◽  
Salvatore Caccamese ◽  
Kenneth L. Rinehart
Keyword(s):  
Crystal Structure ◽  
Absolute Stereochemistry

scholarly journals Rigid and concave, 2,4-cis-substituted azetidine derivatives: A platform for asymmetric catalysis

2018 ◽  
Author(s):  
Akina Yoshizawa ◽  
Antonio Feula ◽  
Louise Male ◽  
Andrew G. Leach ◽  
John Fossey
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Asymmetric Catalysis ◽  
Enantiomeric Excess ◽  
Platinum Complex ◽  
Crystal Structure Analysis ◽  
Single Crystal Structure ◽  
Complex Catalyst ◽  
Reaction Conditions ◽  
Absolute Stereochemistry

A series of single enantiomer, 2,4-<i>cis</i>-disubstituted amino azetidines were synthesised and used as ligands for copper-catalysed Henry reactions of aldehydes with nitromethane. Optimisation of ligand substituents and the reaction conditions was conducted. The enantiomeric excess of the formed products was highest when alkyl aldehydes were employed in the reaction (>99% e.e.). The absolute stereochemistry of one representative azetidine derivative salt was determined by analysis of the Flack parameter of an XRD single crystal structure. The origin of selectivity in catalysis was investigated computationally, revealing the importance of the amino-substituent in determining the stereochemical outcome. A racemic platinum complex of a <i>cis</i>-disubstituted azetidine is examined by XRD single crystal structure analysis with reference to its steric parameters, and analogies to the computationally determined copper complex catalyst are drawn.<br>

The Constituents of Marine Sponges. VII. The Absolute Stereochemistry of Aplyroseol-1.

1997 ◽  
Vol 50 (4) ◽  
pp. 391 ◽  
Author(s):  
Trevor W. Hambley ◽  
Walter C. Taylor ◽  
Stephen Toth
Keyword(s):  
Crystal Structure ◽  
Marine Sponges ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
The Absolute ◽  
Absolute Stereochemistry

The absolute stereochemistry of aplyroseol-1 (1), a diterpenoid isolated from Aplysillarosea Barrois, has been established as (5S; 7R; 8S; 9R; 10S; 13R; 14R; 15R) by determining the crystal structure of the p-bromobenzoyl derivative (3) by X-ray diffraction methods. The structure was refined to a residual of 0·032 for 1451 independent observed reflections. The crystals are monoclinic, space group P 21, a 6·668(8), b 20·04(1), c 10·974(3) Å, β 98·04(7)°.

scholarly journals Crystal Structure and Absolute Stereochemistry of Neoirietetraol

2007 ◽  
Vol 23 ◽  
pp. x103-x104 ◽  
Author(s):  
Hiroki TAKAHASHI ◽  
Yoshinori TAKAHASHI ◽  
Minoru SUZUKI ◽  
Tsuyoshi ABE ◽  
Michio MASUDA
Keyword(s):  
Crystal Structure ◽  
Absolute Stereochemistry
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