Results 211 to 220 of about 1,137,059 (290)

Axially Chiral Nonalternant Polycyclic Aromatic Hydrocarbon With Consecutive Pentagons Exhibiting Large Spin‐Polarized Current

Angewandte Chemie, EarlyView.
Here we report two nonalternant polycyclic aromatic hydrocarbons (PAH) (1 and 2), which contain two and four consecutive pentagons, respectively. Under acidic conditions, 1 and 2 dimerize to afford the axially chiral dimers AC1 and AC2. The central azulene moiety in both 2 and AC2 shows an unusually short transannular bond of 1.366 Å.
Chang Wang, Jiaxin Luo, Haipeng Lu, Junzhi Liu   +3 more
wiley   +1 more source

Green chiral HPLC method on a polysaccharide column under hydro-organic conditions for the determination of Levobupivacaine, Ropivacaine, and their enantiomeric impurities. [PDF]

BMC Chem
Sedki NG, Fayed AS, Salama NN, Hegazy MA.   +3 more
europepmc   +1 more source

PRISM, a Bidirectional NMR Foundation Model: From Peak List to Structure and Back

Angewandte Chemie, EarlyView.
Structure elucidation from NMR can consume an expert for hours or even days. PRISM addresses this with a bidirectional transformer trained on 1.19 M real experimental spectra: it translates 1H and 13C peak lists into structures with 60.1% stereo‐aware top‐1 accuracy (72.5% stereo‐unaware), and, working in reverse, predicts spectra back from structures,
Ajnabiul Hoque, Frank Glorius
wiley   +1 more source

Dispersion, Separation, and Optical Sensing Applications of Single-Walled Carbon Nanotubes. [PDF]

Materials (Basel)
Huang Z, Lu N, Wang L, Wen Y, Liu G, Peng H, Wang L.   +6 more
europepmc   +1 more source

Sequence‐Controlled Helical Ladder Polymers: Impact of Stereochemical Sequence on Helical Geometry and Chiral Recognition

Angewandte Chemie, EarlyView.
Nature programs distinct secondary structures and functions through subtle stereochemical differences, as exemplified by amylose and cellulose. Translating this principle into synthetic ladder polymers, stereochemical sequence control gives rise to diastereomeric coil‐ and ribbon‐type helices with complementary chiral recognition, demonstrating ...
Tomoyuki Ikai, Kanta Wakabayashi, Masaya Yoshida, Kosuke Oki, Eiji Yashima   +4 more
wiley   +1 more source

Rethinking Chiral Decision-Making in Pharmaceutical Analysis: The Emerging Role of Artificial Intelligence. [PDF]

Chirality
Thanikachalam S, Kannappan V.
europepmc   +1 more source

Synthesis of Large‐ and Medium‐Sized Heterobiaryl Atropisomeric Rings and Atropopeptides by Catalytic Intramolecular SNAr

Angewandte Chemie, EarlyView.
Catalytic, intramolecular N‐heterocycle arylation by nucleophilic aromatic substitution (SNAr) is now available for synthesis of highly strained macrocycles and medium‐sized heterobiaryl atropisomeric rings, including atropopeptides. Key to the approach is the ability to generate a strong base catalytically, taking advantage of base‐embedding ...
Alireza Abbasi Kejani, Paritosh Dey, Nicholas H. Stillman, Daniel M. Andrade, Michal Šimek, Martin Dračínský, Daniel Bím, Paulo H. S. Paioti   +7 more
wiley   +1 more source

Optofluidic Sensing and Sorting of Chiral Drugs Based on Core-Shell Composite Microspheres. [PDF]

Sensors (Basel)
Gao H, Yang W, Cao T.
europepmc   +1 more source

Chiroptical Switching by Stereoselective Photochemical Sigmatropic Rearrangements: Experimental Realization of Calderoselectivity

Angewandte Chemie, EarlyView.
Calderoselectivity is established as a stereochemical principle for sigmatropic rearrangements. A homoannulene‐based chiroptical photoswitch undergoes a photochemical [1,11] sigmatropic rearrangement with control of the acyl movement on top of the cyclic π system.
Anne Krenkel, Frederike Beyer, Malte Feßner, Trung Tran Ngoc, Tobias Rüffer, Dominik Hornig, Martin Breugst, Christian Merten, Johannes F. Teichert   +8 more
wiley   +1 more source

Capillary Electrophoretic Enantioseparation of Profens: Advances in Chiral Selectors, Separation Strategies, and Analytical Applications. [PDF]

Molecules
Hancu G, Matean M, Cârje AG.
europepmc   +1 more source