Results 1 to 10 of about 20,067 (277)

Assignment of NMR spectral data of diastereomeric tetrahydrofuranyl acetals directly from their mixture by spectral simulation [PDF]

Journal of the Serbian Chemical Society
In this study, an NMR spectral analysis of the mixture of diastereomeric acetals, synthesized from 2,3-dihydrofurane and a racemic mixture of citronellol, was performed.
Nešić Milan S., Nešić Milica D., Radulović Niko S.   +2 more
doaj   +1 more source

Stereoisomer-Independent Stable Blue Emission in Axial Chiral Difluorenol

Frontiers in Chemistry, 2021
Bulky conjugated molecules with high stability are the prerequisite for the overall improvement of performance in wide-bandgap semiconductors. Herein, a chiral difluorenol, 2,2′-(9,9′-spirobi[fluorene]-2,2′-diyl)bis(9-(4-(octyloxy)phenyl)-9H-fluoren-9-ol)
Mengna Yu, Xiong Jia, Dongqing Lin, Xue Du, Dong Jin, Ying Wei, Linghai Xie, Linghai Xie, Wei Huang, Wei Huang   +9 more
doaj   +1 more source

Research Progress on the Selectivity and Biomagnification of Chiral Hexabromocyclododecanes Pollutants in Food Chain Transfer

Yankuang ceshi, 2016
Hexabromocyclododecanes (HBCDs) are globally produced brominated flame retardant (BFR) and are used primarily as an additive FR in thermal insulation building materials, upholstery textiles, and electronics.
TIAN Qin, TONG Ling, SONG Shu-ling, ZHAN Nan, PAN Meng, QIU Jing   +5 more
doaj   +1 more source

diastereomers

, 2010
Citation: 'diastereomers' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.D01682 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests for commercial
openaire   +1 more source

Unified Total Synthesis of Pteriatoxins and Their Diastereomers [PDF]

Journal of the American Chemical Society, 2006
A unified total synthesis is reported to access all of the possible diastereomers of pteriatoxins A-C, with the use of an intramolecular Diels-Alder reaction as the key step to form the carbo-macrocyclic core structure. The C34/C35-diol protecting groups were found to have significant effects on both the exo/endo-selectivity and the exo-facial ...
Fumiyoshi, Matsuura, René, Peters, Masahiro, Anada, Scott S, Harried, Junliang, Hao, Yoshito, Kishi   +5 more
openaire   +2 more sources

Synthesis of Novel Planar-Chiral Charge-Compensated nido-Carborane-Based Amino Acid

Molecules
Amino acids with unusual types of chirality and their derivatives have recently attracted attention as precursors in the synthesis of chiral catalysts and peptide analogues with unique properties.
Dmitry A. Gruzdev, Angelina A. Telegina, Marina A. Ezhikova, Mikhail I. Kodess, Galina L. Levit, Victor P. Krasnov   +5 more
doaj   +1 more source

The Effect of Alkyl Substituents on the Formation and Structure of Homochiral (R*,R*)-[R₂Ga(µ-OCH(Me)CO₂R′)]₂ Species—Towards the Factors Controlling the Stereoselectivity of Dialkylgallium Alkoxides in the Ring-Opening Polymerization of rac-Lactide

Molecules
Building on our previous studies, which have demonstrated that homochiral propagating species—(R*,R*)-[Me2Ga(µ-OCH(Me)CO2R)]2—were crucial for the heteroselectivity of [Me2Ga(µ-OCH(Me)CO2Me)]2 in the ring-opening polymerization (ROP) of racemic lactide ...
Magdalena Kaźmierczak, Łukasz Dobrzycki, Maciej Dranka, Paweł Horeglad   +3 more
doaj   +1 more source

Double Intramolecular Transacetalization of Polyhydroxy Acetals: Synthesis of Conformationally-Restricted 1,3-Dioxanes with Axially-Oriented Phenyl Moiety

Molecules, 2016
The synthesis of conformationally-restricted 1,3-dioxanes with a phenyl moiety fixed in an axial orientation at the acetalic center is described. Starting with diethyl 3-hydroxyglutarate (15), benzaldehyde acetal 12a and acetophenone ketal 12b bearing a ...
Samuel Asare-Nkansah, Bernhard Wünsch
doaj   +1 more source

Separation of folinic acid diastereomers in capillary electrophoresis using a new cationic β-cyclodextrin derivative. [PDF]

PLoS ONE, 2015
A method for the separation of folinic acid diastereomers by capillary electrophoresis in chiral separation media was developed. Aiming to achieve a good separation of the anionic analytes, a newly synthesized cationic β-cyclodextrin derivative, mono-6 ...
Jia Yu, Xinlei Liang, Zhaokun Wang, Xin Guo, Tiemin Sun, Xingjie Guo   +5 more
doaj   +1 more source

Diastereoselective Spiroannulation of Phenolic Substrates: Advances Towards the Asymmetric Formation of the Manumycin m-C7N Core Skeleton

Molecules, 2007
The asymmetric syntheses of two new spirolactones prepared in optically pure form from L-3-nitrotyrosine are described. The key step, an oxidative spiroannulation, was carried out on the optically active phenols 11a and 11b and afforded the new ...
Thomas W. Scully, Jolene S. Kwasnitza, Randy R. Spaetzel, Guy L. Plourde   +3 more
doaj   +1 more source