Results 131 to 140 of about 89,874 (280)

Efficient Enantiomeric Selectivity Separation Via Homochiral Graphene Oxide Membrane

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A new type of chiral graphene oxide (GO) membrane is proposed that exhibits a separation factor of up to 20.1 as well as a preferential enantiomer flux of 4.5 mmol m−2 h−1. Moreover, the only first FPLC‐compatible column has been further developed via stacking these chiral GO membranes.
Junbo Wang, Jie Jiang, Weijie Yuan, Zonglin Gu, Fangfang Dai, Binquan Peng, Liuhua Mu, Yanwen Tan, Yusong Tu, Pei Li, Liang Chen   +10 more
wiley   +1 more source

Stereochemical Modulation of Palladacyclopentadienyl Complexes Bearing Diphosphine Ligands: A Key to Enhanced DNA Interaction and Anticancer Activity

European Journal of Inorganic Chemistry, EarlyView.
A modular library of structurally robust palladacyclopentadienyl Pd(II) complexes bearing achiral and chiral diphosphines was developed, revealing a strong influence of diphosphine design and ligand chirality on cytotoxicity and selectivity against ovarian cancer cells, including platinum‐resistant models.
Stefania Mautone, Martina Scianna, Isabella Caligiuri, Laura Orian, Pablo Nogara, Nicola Demitri, Flavio Rizzolio, Thomas Scattolin   +7 more
wiley   +1 more source

Quasi-racemates, Racemates and Enantiomers of Cobaloximes [PDF]

Acta Crystallographica Section A Foundations of Crystallography, 2000
C. Hu, R. Härter, I. Kalf, U. Englert
openaire   +1 more source

Chemoselectivity and Enantioselectivity in the Conjugate Reduction of Cinnamate Esters and a Tandem Conjugate Reduction‐Ester Hydrogenation Using Manganese Catalysts

European Journal of Organic Chemistry, EarlyView.
An improved synthesis of a manganese catalyst used for hydrogenation of ketones, esters and imines is reported. The catalyst has now been found to effect tandem conjugate reduction‐ester hydrogenations with very low amounts of allylic alcohol by‐products.
José A. Fuentes, Matthew L. Clarke
wiley   +1 more source

Lipase–V‐MPS Co‐Catalyzed Dynamic Kinetic Resolution of Tertiary Alcohols: Process Intensification Through Catalyst Compartmentalization

European Journal of Organic Chemistry, EarlyView.
Dynamic kinetic resolution of tert‐alcohols co‐catalyzed by lipase and V‐MPS4 is reported, enabled by compartmentalization using a polydimethylsiloxane thimble. Physical separation of V‐MPS4 from lipase and Na2CO3 was crucial for preserving its racemization activity.
Satoshi Horino, Karla Wagner, Anke Hummel, Kyohei Kanomata, Harald Gröger, Shuji Akai   +5 more
wiley   +1 more source

racemic mixture

, 2014
Citation: 'racemic mixture' 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.R05029 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Triptindane‐9,10,11‐triol: Threefold Hydride Transfer from Lithium Aluminum Hydride as the Key Step to C3‐Symmetrically Trifunctionalized Tribenzo[3.3.3]propellanes

European Journal of Organic Chemistry, EarlyView.
Threefold reduction of 9,10,11‐triptindanetrione with LiAlH4 or NaBH4 yields exclusively the C3‐symmetric triol, suggesting an intracomplex (“rolling”) mechanism. However, use of LiAlH4/LiAlD4 (1 : 1) reveals a preceding hydride exchange. Mechanistic implications are discussed including the reduction of the related diketone.
Thorsten Hackfort, Bernhard M. Malorny, Andreas Mix, Beate Neumann, Hans‐Georg Stammler, Dietmar Kuck   +5 more
wiley   +1 more source

Total Synthesis of rac‐Keramamine C Enabled by Intrinsic H‐Bond‐Induced Conformational Fixation of Amides

European Journal of Organic Chemistry, EarlyView.
The total synthesis of the manzamine alkaloid keramamine C (2) in its racemic form was achieved in 5 steps, with ring‐closing metathesis as the key step. The metathesis is strongly improved by an intramolecular H‐bond‐induced conformational fixation of the amide bond, inducing close proximity of the terminal double bonds in the precursor molecule.
Jana Ganzmann, Ryan Thurston, Pascal Riester, Nina Hegmann, Markus R. Heinrich   +4 more
wiley   +1 more source

Racemate [PDF]

, 2020
openaire   +1 more source

Chan–Lam Cross‐Coupling With Alkylboron Reagents: From Transmetallation to Radical Pathways

European Journal of Organic Chemistry, EarlyView.
Alkylative Chan–Lam coupling overcomes intrinsic transmetallation limitations of alkylboron reagents by engaging radical pathways. Recent advances reveal how radical and radical–polar crossover mechanisms enable mild C(sp3)—heteroatom bond formation. This minireview highlights key mechanistic insights and emerging strategies that transform alkylboron ...
Nicolas G.‐Simonian, Andrea Serafino, Luc Neuville, Géraldine Masson   +3 more
wiley   +1 more source