Optically Active Trialkynyl(phenyl)methane: Synthesis and Determination of Its Absolute Configuration by Vibrational Circular Dichroism (VCD) and Optical Rotatory Dispersion (ORD)

2010 ◽  
Vol 2010 (13) ◽  
pp. 2452-2456 ◽  
Author(s):  
Boris Buschhaus ◽  
Vito Convertino ◽  
Pablo Rivera-Fuentes ◽  
José Lorenzo Alonso-Gómez ◽  
Ana G. Petrovic ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Absolute Configuration ◽  
Optically Active ◽  
Vibrational Circular Dichroism ◽  
Optical Rotatory Dispersion ◽  
Rotatory Dispersion ◽  
Optical Rotatory ◽  
Circular Dichroïsm

scholarly journals Assignment Through Chiroptical Methods of The Absolute Configuration of Fungal Dihydropyranpyran-4-5-Diones Phytotoxins, Potential Herbicides for Buffelgrass (Cenchrus ciliaris) Biocontrol

Molecules ◽  
2019 ◽  
Vol 24 (17) ◽  
pp. 3022 ◽  
Author(s):  
Ernesto Santoro ◽  
Giuseppe Mazzeo ◽  
Giulia Marsico ◽  
Marco Masi ◽  
Giovanna Longhi ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Computational Methods ◽  
Absolute Configuration ◽  
Vibrational Circular Dichroism ◽  
Optical Rotatory Dispersion ◽  
Rotatory Dispersion ◽  
Optical Rotatory ◽  
Cenchrus Ciliaris ◽  
The Absolute ◽  
Circular Dichroïsm

Radicinin and cochliotoxin (1 and 2) two phytotoxic pyranpyran-4,5-diones were isolated together with their close metabolites 3-epi-radicinin, radicinol, and its 3-epimer (3–5), from the culture filtrates of Cochliobolus australiensis, a fungus proposed as mycoherbcide for biocontrol of buffelgrass, a very noxious and dangerous weed. The absolute configuration of cochliotoxin was determined by chiroptical Optical Rotatory Dispersion (ORD), Electronic Circular Dichroism (ECD), and Vibrational Circular Dichroism (VCD)) and computational methods. The same methods were used to confirm that of radicinin, radicinol and their 3-epimers, previously determined with chemical, spectroscopic and ECD methods.

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