ChemInform Abstract: Circular Dichroism of Twisted π-Electron Systems: Theoretical Determination of the Absolute Stereochemistry of Natural Products and Chiral Synthetic Organic Compounds

ChemInform ◽  
2010 ◽  
Vol 26 (37) ◽  
pp. no-no
Author(s):  
N. HARADA
Keyword(s):  
Natural Products ◽  
Circular Dichroism ◽  
Organic Compounds ◽  
Electron Systems ◽  
Theoretical Determination ◽  
Synthetic Organic Compounds ◽  
The Absolute ◽  
Circular Dichroïsm ◽  
Absolute Stereochemistry

scholarly journals Determination of the Absolute Stereochemistry of Limonene and α-Santalol by Raman Optical Activity Spectroscopy

2012 ◽  
Vol 7 (4) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Akira Sakamoto ◽  
Nao Ohya ◽  
Toshio Hasegawa ◽  
Hiroaki Izumi ◽  
Nakako Tokita ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Optical Activity ◽  
Absolute Configuration ◽  
Natural Compounds ◽  
Vibrational Circular Dichroism ◽  
Raman Optical Activity ◽  
The Absolute ◽  
Circular Dichroïsm ◽  
Absolute Stereochemistry

Determining the absolute stereochemistry of organic compounds in solution remains a challenge. We investigated the use of Raman optical activity (ROA) spectroscopy to address this problem. The absolute configurations of (+)-( R)- and (-)-( S)-limonene were determined by ROA spectroscopy, which can be applied to smaller amounts of sample as compared with vibrational circular dichroism (VCD) spectroscopy. This ROA method was also applied to (+)-( E)-α-santalol and shown to be successful in the determination of the absolute configuration of this compound. ROA spectroscopy shows promise as a useful tool for determining the absolute stereochemistry of many natural compounds.

scholarly journals Vibrational Circular Dichroism: Recent Advances for the Assignment of the Absolute Configuration of Natural Products

2015 ◽  
Vol 10 (10) ◽  
pp. 1934578X1501001 ◽  
Author(s):  
Eleuterio Burgueño-Tapia ◽  
Pedro Joseph-Nathan
Keyword(s):  
Natural Products ◽  
Circular Dichroism ◽  
Absolute Configuration ◽  
Aromatic Compounds ◽  
Vibrational Circular Dichroism ◽  
Exciton Coupling ◽  
Coupling Approach ◽  
The Absolute ◽  
Circular Dichroïsm

Vibrational circular dichroism (VCD) emerged during the last decade as a reliable tool for the absolute configuration (AC) determination of organic compounds. The principles, instrumentation, and methodology applied prior to early 2013 were recently reviewed by us. Since VCD is a very dynamic field, the aim of this review is to update VCD advances for the AC assignment of terpenoids, aromatic compounds, alkaloids, and other natural products for the 2013-2014 period, when VCD was applied to the AC assignment of some 70 natural products. In addition, although discovered in 2012, a brief introduction to the VCD exciton coupling approach and its applications in natural products AC assignment is presented.

scholarly journals Vibrational Circular Dichroism: Recent Advances for the Assignment of the Absolute Configuration of Natural Products

2017 ◽  
Vol 12 (5) ◽  
pp. 1934578X1701200 ◽  
Author(s):  
Eleuterio Burgueño-Tapia ◽  
Pedro Joseph-Nathan
Keyword(s):  
Natural Products ◽  
Circular Dichroism ◽  
Absolute Configuration ◽  
Aromatic Compounds ◽  
Vibrational Circular Dichroism ◽  
Exciton Coupling ◽  
Coupling Approach ◽  
The Absolute ◽  
Circular Dichroïsm

Vibrational circular dichroism (VCD) emerged during the last decade as a reliable tool for the absolute configuration (AC) determination of organic compounds. The principles, instrumentation, and methodology applied prior to early 2013 were recently reviewed by us. Since VCD is a very dynamic field, the aim of this review is to update VCD advances for the AC assignment of terpenoids, aromatic compounds, alkaloids, and other natural products for the 2013–2014 period, when VCD was applied to the AC assignment of some 70 natural products. In addition, although discovered in 2012, a brief introduction to the VCD exciton coupling approach and its applications in natural products AC assignment is presented.

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