ChemInform Abstract: Synthesis and Circular Dichroism of Optically Pure (+)-(1S,2S,5S)-5-Methoxy-3,4,6,7-tetramethylidenebicyclo(3.2.1)oct-2-yl Derivatives. Baker′s Yeast Reduction of 4-Methoxy-5,6,7,8-tetramethylidenebicyclo(2.2.2)octan-2-one.

ChemInform ◽  
1990 ◽  
Vol 21 (40) ◽  
Author(s):  
G. BURNIER ◽  
P. VOGEL
Keyword(s):  
Circular Dichroism ◽  
Optically Pure ◽  
Circular Dichroïsm

Circular Dichroism Determination of the Conformation of Optically Pure 1-(1-Naphthyl)ethylamino-Substituted 1,3,5-Triazine Derivatives

1998 ◽  
Vol 63 (24) ◽  
pp. 8765-8768 ◽  
Author(s):  
Anna Iuliano ◽  
Emanuela Franchi ◽  
Gloria Uccello-Barretta ◽  
Piero Salvadori
Keyword(s):  
Circular Dichroism ◽  
Triazine Derivatives ◽  
Optically Pure ◽  
Circular Dichroïsm

scholarly journals Isolation and Absolute Configurations of Diversiform C17, C21 and C25 Terpenoids from the Marine Sponge Cacospongia sp.

Marine Drugs ◽  
2018 ◽  
Vol 17 (1) ◽  
pp. 14 ◽  
Author(s):  
Xingwang Zhang ◽  
Ping-Lin Li ◽  
Guo-Fei Qin ◽  
Shengying Li ◽  
Nicole de Voogd ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Cell Lines ◽  
Optical Rotation ◽  
Human Tumor ◽  
Chiral Hplc ◽  
Pure Compounds ◽  
New Compounds ◽  
First Time ◽  
Optically Pure ◽  
Circular Dichroïsm

Chemical investigation of MeOH extract of a South China Sea sponge Cacospongia sp. yielded 15 terpenoids belonging to three different skeleton-types, including the unusual C17 γ-lactone norditerpenoids (1–3), the rare C21 pyridine meroterpenoid (7), and the notable C25 manoalide-type sesterterpenoids (4–6, 8–10). Compounds 1–5 were initially obtained as enantiomers, and were further separated to be optically pure compounds (1a, 1b, 2a, 2b, 3a-r, 3b-r, 4a, 4b, 5a and 5b) by chiral HPLC, with a LiAlH4 reduction aid for 3. Compounds 3a/3b (a pair of inseparable enantiomers), 4a, 5a, 6, and 7 were identified as new compounds, while 1a/1b and 2a/2b were obtained from a natural source and were determined for their absolute configurations for the first time. This is also the first time to encounter enantiomers of the well-known manoalide-type sesterterpenoids from nature. The structures with absolute configurations of the new compounds were unambiguously determined by comprehensive methods including HR-ESI-MS and NMR data analysis, optical rotation comparison, experimental and calculated electronic circular dichroism (ECD), and Mo2(OAc)4 induced circular dichroism (ICD) methods. The cytotoxicity of the isolates against selected human tumor cell lines was evaluated, however, the tested compounds showed no activity against selected cell lines.

Vibrational Circular Dichroism Study of Optically Pure Cryptophane-A

2006 ◽  
Vol 128 (16) ◽  
pp. 5533-5540 ◽  
Author(s):  
Thierry Brotin ◽  
Dominique Cavagnat ◽  
Jean-Pierre Dutasta ◽  
Thierry Buffeteau
Keyword(s):  
Circular Dichroism ◽  
Vibrational Circular Dichroism ◽  
Optically Pure ◽  
Circular Dichroïsm

scholarly journals Trimeric and Dimeric Carbazole Alkaloids from Murraya microphylla

Molecules ◽  
2021 ◽  
Vol 26 (18) ◽  
pp. 5689
Author(s):  
Xiaoli Ma ◽  
Hongwei Chen ◽  
Sisi Zhu ◽  
Pengfei Tu ◽  
Yong Jiang
Keyword(s):  
Circular Dichroism ◽  
Data Analysis ◽  
Chiral Hplc ◽  
Hplc Separation ◽  
Electronic Circular Dichroism ◽  
Nmr Data ◽  
New Compounds ◽  
Optically Pure ◽  
Circular Dichroïsm ◽  
Carbazole Alkaloids

Seventeen new carbazole alkaloid derivatives, including a trimeric carbazole racemate, (±)-microphyltrine A (1), 15 dimeric carbazole racemates, (±)-microphyldines A–O (2–16), and a C-6–C-3″-methyl-linked dimeric carbazole, microphyldine P (17), were isolated from the leaves and stems of Murraya microphylla (Merr. et Chun) Swingle. The structures of the new compounds were elucidated on the basis of HRESIMS and NMR data analysis. The optically pure isomers of these isolated carbazole alkaloids were obtained by chiral HPLC separation and their absolute configurations were determined by electronic circular dichroism (ECD) data analysis.

scholarly journals The application of chiroptical spectroscopy (circular dichroism) in quantifying binding events in lanthanide directed synthesis of chiral luminescent self-assembly structures

2015 ◽  
Vol 6 (1) ◽  
pp. 457-471 ◽  
Author(s):  
Oxana Kotova ◽  
Salvador Blasco ◽  
Brendan Twamley ◽  
John O'Brien ◽  
Robert D. Peacock ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Self Assembly ◽  
Lanthanide Ions ◽  
Carboxylic Group ◽  
Tridentate Ligands ◽  
Directed Synthesis ◽  
Optically Pure ◽  
Circular Dichroïsm ◽  
Chiroptical Spectroscopy

The binding of asymmetrical and optically pure tridentate ligands containing one carboxylic group and 2-naphthyl as an antenna to lanthanide ions was studied in CH3CN.

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