Results 101 to 110 of about 48,679 (293)
Dibenzo[a,f]quinolizines: syntheses and cytostatic activity in estrogen-sensitive tumor cells
, 1994 A number of methoxy-substituted 7,11b,12,13-tetrahydro-6H-dibenzo-[a,f]quinolizines with short alkyl groups in position 6 or 12 were synthesized by the Bischler-Napieralski reaction using the appropriate starting material followed by a second ring ...
Wiegrebe, Wolfgang +4 more
core +1 more source
The Enantiomers of Trinorbornane and Derivatives Thereof
, 2020 Herein, we report the synthesis of the enantiomers of trinorbornane, a tetracyclic saturated hydrocarbon with the chemical formula C11H16. The preparation of these rigid carbon scaffolds was enabled by the successful chiral separation of its tricyclic ...
Thomas Bürgi +9 more
core +1 more source
Nicotine enantiomers and their pharmacological properties.
, 2022 Nicotine enantiomers and their pharmacological properties.
Susan Plunkett (12419128) +6 more
core +1 more source
Topological Materials and Related Applications
Advanced Electronic Materials, EarlyView.This review covers topological materials—including topological insulators, quantum valley Hall and quantum spin Hall insulators, and topological Weyl and Dirac semimetals—as well as their most recent advancements in fields such as spintronics, electronics, photonics, thermoelectrics, and catalysis.
Carlo Grazianetti +9 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
Isolation of enantiomers via diastereomer crystallisation
, 2010 Enantiomer separation remains an important technique for obtaining optically active materials. Even though the enantiomers have identical physical properties, the difference in their biological activities make it important to separate them, in order ...
Anandamanoharan, P.
core
Structure of MDMA enantiomers.
, 2016 Structure of MDMA enantiomers.
Márcio W. Paixão (3138753) +4 more
core +1 more source
Angewandte Chemie, EarlyView.An efficient, enantiodivergent synthesis of phosphorylated oxindoles with quaternary stereocenters is achieved via a nickel‐catalyzed intermolecular Heck‐phosphorylation cascade. Employing a single chiral catalyst, either product enantiomer is selectively accessed simply by changing the alkene leaving group. DFT calculations trace this stereodivergence
Haimeng Zhu +4 more
wiley +2 more sources
Light and Dark Cycles Control the Structural Evolution of Photoresponsive Supramolecular Systems
Angewandte Chemie, EarlyView.Here, we report a photoswitchable synthetic peptide that, under light energy cycles, exhibits supramolecular polymorphism coupled to darkness‐driven structural self‐selection. We demonstrate that light sustains a transient assembled state in the form of helical nanoribbons, hindering the system from undergoing a transition to the disassembled state ...
Alejandro Méndez‐Ardoy +6 more
wiley +2 more sources
Programming Palladium Cage Geometry through Ligand Redox Modulation
Angewandte Chemie, EarlyView.A neutral redox‐active exTTF ligand (L) forms a Pd2L4 cage, whereas its oxidized form (Lox) yields a Pd2(Lox)2 macrocycle. Lox further assembles with a dibenzothiophene derivative (L′) into Pd2(Lox)(L′)2 and Pd4(Lox)4(L′)4 architectures. Reduction of Pd2(Lox)2 and Pd2(Lox)(L′)2 restores the parent Pd2L4 cage, enabling redox controlled nuclearity ...
Jennifer Bou Zeid +11 more
wiley +2 more sources