Results 111 to 120 of about 83,738 (273)

Enantioselective synthesis of 4-amino-3,4-dihydrocoumarins and their non-cyclic hydroxyester precursors: Biological evaluation for the treatment of glioblastoma multiforme

open access: hybrid, 2022
Lorenzo G. Borrego   +10 more
openalex   +2 more sources

Spin Matters: A Multidisciplinary Roadmap to Understanding Spin Effects in Oxygen Evolution Reaction During Water Electrolysis

open access: yesAdvanced Energy Materials, EarlyView.
This roadmap offers a forward‐looking perspective on spin enhancement in the oxygen evolution reaction. It highlights how combining systematic experiments, advanced computational modeling, and novel magnetic, chiral, or hybrid materials can deepen the understanding of spin‐dependent catalytic mechanisms.
Emma van der Minne   +29 more
wiley   +1 more source

Spirosilanes Activate Gold(I)‐Catalysts in Cycloisomerization and Intermolecular Reactions

open access: yesAngewandte Chemie, EarlyView.
Spirosilanes activate LAuCl complexes to promote catalysis. This silver‐free activation through weak interactions is nondestructive so that low loadings of LAuCl are possible as well as their recycling. It can also be beneficial for asymmetric catalysis.
Lukmonjon Mutalliev   +7 more
wiley   +2 more sources

Catalytic enantioselective synthesis of quaternary carbon stereocentres. [PDF]

open access: yes, 2014
Quaternary carbon stereocentres-carbon atoms to which four distinct carbon substituents are attached-are common features of molecules found in nature. However, before recent advances in chemical catalysis, there were few methods of constructing single ...
Overman, Larry E, Quasdorf, Kyle W
core  

Symmetry Breaking in Chiral Gold Nanoclusters by Ansa‐Metallamacrocycles Strain

open access: yesAggregate, EarlyView.
In this work, we prepare a chiral Au11 nanocluster ligated by diphosphine ligand, Au11(dppp)5Cl3, which is induced by the unique ansa‐metallamacrocycle stain (the “Au─P─CH2CH2CH2─P─Au” staple). ABSTRACT Chiral nanomaterials have recently stimulated significant interest in both fundamental research and practical applications (e.g., nanoprobes for ...
Zhiwen Li   +6 more
wiley   +1 more source

Enantioconvergent Access to Chiral S(VI) Stereocenters by Kinetic Resolution of Sulfonimidoyl Chlorides

open access: yesAngewandte Chemie, EarlyView.
An enantioconvergent approach for the kinetic resolution of S(VI) stereocenters that leverages the electrophilic reactivity of the chiral sulfur atom is described. The catalytic process provides access to sulfonimidoyl chlorides and sulfonimidates, which are among the least studied S(VI) functionalities.
Arko Das   +10 more
wiley   +2 more sources

Recent Advances in Enhancing Functionalization of Atomically Precise Copper Hydride Clusters

open access: yesAggregate, EarlyView.
In this review, advances in the methodology for the preparation and understanding of atomically precise copper hydride clusters are comprehensively summarized. Whereafter, the methods of structures determination in copper hydride clusters are discussed in detail.
Miao‐Miao Zhang   +6 more
wiley   +1 more source

Fluoride‐Transfer Asymmetric Allylic Alkylation Enables Regiodivergent, Stereoselective Cross‐Electrophile Coupling

open access: yesAngewandte Chemie, EarlyView.
We report a fluoride‐transfer asymmetric allylic alkylation (AAA) in which all reagent atoms, including the leaving group, are incorporated into the products. This atom‐efficient AAA protocol enables the cross‐electrophile coupling of allyl fluorides and gem‐difluoroalkenes, providing a catalyst‐controlled, regiodivergent, and stereoselective access to
Jordi Duran   +5 more
wiley   +2 more sources

Stereoselective total synthesis and enantioselective formal synthesis of the antineoplastic sesquiterpene quinone metachromin A

open access: yesJournal of the Brazilian Chemical Society, 1999
The first total synthesis of the antineoplastic marine natural product metachromin-A (1) was accomplished through a convergent synthetic approach amenable to the preparation of analogues for biological studies.
Almeida Wanda P.   +1 more
doaj  

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