Results 71 to 80 of about 53,376 (301)
Crystal structures of racemic and enantiomeric 5-isopropyl-5-methylhydantoin [PDF]
, 2014 Crystal structures of racemic and enantiomeric 5-isopropyl-5-methylhydantoin (IPrMH) have been determined by single crystal X-ray diffraction. Melting temperatures and solid state infrared spectra are also measured.
Fujinami, Shuhei +6 more
core +1 more source
Advanced Science, EarlyView.This work designs a peptide‐free polyelectrolyte with stable, switchable conformations and near‐infrared fluorescence in water. It harnesses a cooperative Fe3+‐triggered sheet‐to‐helix transition to generate nonlinear fluorescence quenching, enabling the ultrasensitive, real‐time visualization of Fe3+ ion distribution and metabolic trafficking at ...
Yeqiang Zhou +9 more
wiley +1 more source
Angewandte Chemie, EarlyView.An enantioselective rhodium‐catalyzed [2 + 2 + 2] cycloaddition enables the synthesis of axially chiral diaryl ethers. Carbonyl coordination ensures high reactivity and regioselectivity, affording products bearing up to four stereogenic axes with good enantio‐ and diastereoselectivity.
Yu Sato +3 more
wiley +2 more sources
Determining the enantioselectivity of chiral catalysts - mass spectrometry as a mechanistic and screening tool [PDF]
, 2014 This thesis is focused on the application of ESI-MS as a screening method and mechanistic tool for organocatalyzed reactions. In previous studies cationic metal complexes or iminium ions were the key intermediates to be detected by ESI-MS analysis.
Bächle, Florian
core +1 more source
Advanced Science, EarlyView.A self‐assembled monolayer (≈0.9 nm) of an axially chiral binaphthol phosphoric acid derivative on a ferromagnetic Ni/NiOx substrate shows chiral‐induced spin selectivity (CISS) magnetoresistance of 50%–80%. This thermally and chemically robust functional stack shows the way towards practical spintronic devices based on the CISS effect.
Abin Nas Nalakath +8 more
wiley +1 more source
Asymmetric Iron‐Catalyzed Vicinal C(sp3)─H Diamination of Carboxylic Acids
Angewandte Chemie, EarlyView.An iron‐catalyzed vicinal α,β‐C(sp3)─H diamination of readily available carboxylic acids furnishes chiral α,β‐diamino acids in a single pot with high regio‐, diastereo‐, and enantioselectivity (up to >20:1 dr and >99% ee). ABSTRACT The direct construction of chiral 1,2‐diamines through the stereoselective functionalization of two vicinal C(sp3)─H bonds
Bing Zhou +5 more
wiley +2 more sources
PLoS ONEKetamine has gained significant attention as a fast-acting antidepressant. However, ketamine is also associated with undesirable side effects. In our preclinical study, we explored the behavioral effects of ketamine enantiomers at subanesthetic doses ...
Kristian Elersič +3 more
doaj +1 more source
Control of self-assembly pathways toward conglomerate and racemic supramolecular polymers
Nature Communications, 2020 Homo- and heterochiral aggregation is a process of interest to prebiotic and chiral separation chemistry. Here, the authors analyze the self-assembly of a racemic mixture into 1D supramolecular polymers and find homochiral aggregation into conglomerates ...
Marius Wehner +3 more
doaj +1 more source
Intramolecular Silanoxy-Michael Reactions with Pendant Nitroalkenes, Racemic and Enantioselective [PDF]
We present the first racemic and scalemic examples of di-tert-butyl silanoxy Michael additions. Our operationally simple protocol is selective for nitro-olefins and simply involves stirring substrate with an appropriate hydrogen-bond donor catalyst ...
Harshit, Joshi, Shyam, Sathyamoorthi
core +1 more source
Total Syntheses of Racemic and Natural Glycinol [PDF]
, 2016 Total syntheses of racemic and (−)-glycinol (1) are described. A Wittig reaction produced the isoflav-3-ene from which a Sharpless dihydroxylation introduced either the racemic or enantiomeric 6a-hydroxy group.
Michael Reese (2169010) +4 more
core +1 more source