Results 161 to 170 of about 10,075 (214)

Imidazol-2-ylidene-Based NCCN Ligands for Chiral-at-Iron Catalysis. [PDF]

Organometallics
Hinterlang L, Ivlev SI, Meggers E.
europepmc   +1 more source

Diastereodivergent and Enantioselective Organocatalytic Synthesis of Spiro-Fused Coumarins via [4+2] Cycloadditions. [PDF]

Org Lett
Hidalgo-León R, Trujillo-Sierra J, Sansano JM, Cossío FP, Cozar A, Retamosa MG.   +5 more
europepmc   +1 more source

Impact of Thymidine Loop Modifications on Telomeric G-Quadruplex Catalytic Systems for Asymmetric Sulfoxidation. [PDF]

Molecules
Finamore C, Festa C, Benigno D, Aliberti C, Barbato R, De Marino S, Galeone A, Esposito V, Virgilio A.   +8 more
europepmc   +1 more source

Structural Tuning of Inefficient <i>C</i> ₁‑Symmetric Iodoarene for Efficient Enantioselective Oxidative Organocatalysis. [PDF]

ACS Omega
Pavankumar K, Shirke RP, Kim K, Nangunuri BG, Kim MH.   +4 more
europepmc   +1 more source

Stereoselective Bio-Organocatalytic Cascade to Chiral Amides as Active Pharmaceutical Ingredient Intermediates Using ω-Transaminase and Choline Chloride Under Microwave Irradiation. [PDF]

ChemSusChem
Romano S, Damian M, Nardi M, Procopio A, Strähler S, Preschel D, Oliverio M, Mutti FG.   +7 more
europepmc   +1 more source

Palladium-Catalyzed Enantioselective [4 + 2] Annulation with Allenes: Direct Access to Chiral Silatetralins. [PDF]

JACS Au
Zhou H, Sun Y, Xu R, Chen T, Gao L, Zhao G, Zhang J, Wang Y.   +7 more
europepmc   +1 more source

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Measurement of Enantiomeric Excess by Kinetic Resolution and Mass Spectrometry

Angewandte Chemie - International Edition, 1999
New applications for your mass spectrometer-use it to measure enantiomeric excess! The enantiomeric content of very small quantities of chiral alcohols and amines has been determined by derivatization with chiral acylating agents in which mass is correlated to absolute configuration.
Jiangyue Wu, Gary Siuzdak, M G Finn
exaly   +3 more sources

Determination of enantiomeric excess by chiral liquid chromatography without enantiomerically pure starting standards

Biomedical Chromatography, 2012
ABSTRACTA facile approach for the enantiomeric excess determination of enantiomeric mixtures without the necessity of pure enantiomer standards is presented. Promethazine and trimeprazine commercial nonracemic mixtures were used as cases study to probe the validity of the method.
F Garcia Sanchez, A Navas Diaz, Manuel Algarra   +2 more
exaly   +3 more sources

An approach to the determination of the enantiomeric excess at the extreme case by capillary electrophoresis

Journal of Chromatography A, 2015
Capillary electrophoresis (CE) has been applied to determine the percentage of enantiomeric excess (ee%) of chiral compounds. In such assays, the quality of chiral selectors (CSs) plays vital roles in resolving the enantiomers for accurate determination of the ee%.
Youxin Li, James J Bao, Yong Zhang
exaly   +3 more sources

Enantiomeric Excesses and Electronic Chirality Measure

Journal of the American Chemical Society, 2003
We present an approach to measure the amount of chirality in the electronic wave function and apply it to the study of a set of asymmetric aminohydroxylation reactions. The correlation coefficient between the chirality measure and the enantiomeric excesses is larger than 0.9 and suggests that this phenomenological approach can be a valuable tool to ...
Luca, Bellarosa, Francesco, Zerbetto
openaire   +2 more sources