X-Ray crystal and molecular structure of the bromolactone of echinocystic acid diacetate. The absolute configuration of naturally occurring oleananes

1974 ◽  
pp. 284 ◽  
Author(s):  
Charles H. Carlisle ◽  
Peter F. Lindley ◽  
Aurea Perales ◽  
Robin B. Boar ◽  
James F. McGhie ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Absolute Configuration ◽  
Crystal And Molecular Structure ◽  
X Ray ◽  
Echinocystic Acid ◽  
Naturally Occurring ◽  
The Absolute

Sedum alkaloids, IV, the X-ray crystal and molecular structure of sederine hydrochloride and the absolute configuration of sederine

2010 ◽  
Vol 92 (1) ◽  
pp. 21-24
Author(s):  
Carla Piccinni-Leopardi ◽  
Gabriel Germain ◽  
Maurice van Meerssche ◽  
Brigitte Colau ◽  
Claude Hootele
Keyword(s):  
Molecular Structure ◽  
Absolute Configuration ◽  
Crystal And Molecular Structure ◽  
X Ray ◽  
The Absolute

scholarly journals Crystal and molecular structure of jatrophane diterpenoid (2R,3R,4S,5R,7S,8S,9S,13S,14S,15R)-2,3,8,9-tetraacetoxy-5,14-bis(benzoyloxy)-15-hydroxy-7-(isobutanoyloxy)jatropha-6(17),11(E)-diene

2019 ◽  
Vol 75 (12) ◽  
pp. 1884-1887
Author(s):  
Hequn Yang ◽  
Jiangyu Zhao ◽  
Samat Talipov ◽  
Lidiya Izotova ◽  
Haji Akber Aisa ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Absolute Configuration ◽  
Crystal And Molecular Structure ◽  
The Absolute

The structure of the jatrophane diterpenoid (ES2), C46H56O15, has orthorhombic (P212121) symmetry. The absolute configuration in the crystal has been determined as 2R,3R,4S,5R,7S,8S,9S,13S,14S,15R [the Flack parameter is −0.06 (11)]. The molecular structure features intramolecular O—H...O and C—H...O hydrogen bonding. In the crystal, C—H...O hydrogen bonds link the molecules into supramolecular columns parallel to the a axis. One of the acetoxy substituents is disordered over two orientations in a 0.826 (8):0.174 (8) ratio.

Sign in / Sign up

Export Citation Format

Share Document