Results 121 to 130 of about 53,376 (301)

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

Effects of Chirality on the Antifungal Potency of Methylated Succinimides Obtained by Aspergillus fumigatus Biotransformations. Comparison with Racemic Ones

Molecules, 2013
Eighteen (3R) and (3R,4R)-N-phenyl-, N-phenylalkyl and N-arylsuccinimides were prepared with high enantioselectivity by biotransformation of maleimides with A. fumigatus.
Susana Zacchino, Agustina Postigo, Maximiliano Sortino   +2 more
doaj   +1 more source

A Chiral Saddle‐Shaped Nanographene With Two Heptagon‐Embedded [4]Helicenes

Angewandte Chemie International Edition, EarlyView.
We present a novel synthetic strategy toward a chiral saddle‐shaped nanographene (cSNG) via a two‐step oxidation of a prochiral anthracene precursor. The Scholl‐type oxidation first yields a key intermediate with sp3‐defect heptagons, and subsequent oxidative dehydrogenation affords fully conjugated cSNG.
Felix Trautner, Boris Borrisov, Philipp Royla, Hongqing Zhao, Hartmut Komber, Li Wan, Evgenia Dmitrieva, Ji Ma, Jan J. Weigand, Qun Yang, Xinliang Feng, Wenhui Niu   +11 more
wiley   +1 more source

Self-assembly of metallosupramolecular rhombi from chiral concave 9,9’-spirobifluorene-derived bis(pyridine) ligands

Beilstein Journal of Organic Chemistry, 2014
Two new 9,9’-spirobifluorene-based bis(4-pyridines) were synthesised in enantiopure and one also in racemic form. These ligands act as concave templates and form metallosupramolecular [(dppp)2M2L2] rhombi with cis-protected [(dppp)Pd]2+ and [(dppp)Pt]2 ...
Rainer Hovorka, Sophie Hytteballe, Torsten Piehler, Georg Meyer-Eppler, Filip Topić, Kari Rissanen, Marianne Engeser, Arne Lützen   +7 more
doaj   +1 more source

Quantitative determination of racemic bromkamfora [PDF]

, 2019
The paper discusses some issues that arise in the quantitative determination of racemic bromkamfora.В работе рассмотрены некоторые вопросы, возникающие при количественном определении бромкамфоры ...
Сахапова, Э. Ф., Sahapova, E. F., Zyryanov, V. A., Зырянов, В. А.   +3 more
core  

Intranasal racemic ketamine in treatment-resistant depression: Efficacy and tolerability in outpatient treatment

Journal of Affective Disorders Reports
Background and aim: Intranasal racemic ketamine is an off-label alternative for treatment-resistant depression (TRD), offering a non-invasive and compared to esketamine less expensive option. However, its efficacy and safety in outpatient settings remain
Jan Sarlon, Timur Liwinski, Annette Beatrix Bruehl, Deanne Thomi, Undine Emmi Lang   +4 more
doaj   +1 more source

Enantiomeric Separation of Racemic Drugs Using Chiral Self-Assembled Monolayers [PDF]

, 2010
Enantiomeric separation of racemic drugs is a never ending battle for pharmaceutical chemists. Conventional approaches to separating enantiomers (mirror-image stereoisomers) typically rely on chromatography utilizing chiral stationary phases or reactions
Blaisdell, Thomas Powers
core  

Anomeric Amide Enabled Divergent Synthesis of Unsymmetrical Ureas, Carbamates, Thioesters, and Amides From Aldehydes

Angewandte Chemie International Edition, EarlyView.
An anomeric amide‐enabled divergent aldehyde functionalization sequence provides one‐pot access to unsymmetrical ureas, carbamates, thiocarbamates, thioesters, and amides. Key to this transformation is the formation of N‐Boc‐hydroxamate intermediates, which serve as platforms for orthogonal activation via Lossen‐type rearrangements, single‐electron ...
Jasper L. Tyler, Meiyi Zeng, Julius Wiener, Marie‐Christin Leusmann, Colin Stein, Constantin G. Daniliuc, Frank Glorius   +6 more
wiley   +1 more source

The Oxidation Mechanisms of Saturated Fatty Acids: Formation of Hydroperoxide Isomers and Production of 2‐Alkanones and Lactones

Journal of the American Oil Chemists' Society, EarlyView.
ABSTRACT Saturated fatty acids (SFAs) are generally regarded simply as being resistant to oxidation compared with unsaturated fatty acids. However, it has long been reported that SFAs can undergo oxidation when heated at high temperatures, leading to the formation of unique degradation products such as 2‐alkanones and lactones.
Kanji Aoyagi, Shunji Kato, Kiyotaka Nakagawa   +2 more
wiley   +1 more source

Quantum Phenomena in Molecular and Biological Systems: A Decoherence‐Based Decision Framework With Falsifiable Predictions and a Failure‐Mode Taxonomy

Advanced Physics Research, EarlyView.
A physics‐grounded framework based on decoherence timescales (τ_dec vs τ_func), Markovian validity, and falsifiability criteria is applied across molecular systems to distinguish where quantum effects are necessary, marginal, or irrelevant. The analysis integrates quantum chemistry, biological quantum mechanisms, and quantum computing under a unified ...
Sarfaraz K. Niazi
wiley   +1 more source