Results 241 to 250 of about 119,767 (324)

“On Water” Photochemistry: Visible‐Light‐Induced Synthesis of Diaryl Sulfides by Nitrogen Extrusion

open access: yesChemistryEurope, EarlyView.
This study demonstrates an efficient and versatile blue light‐mediated synthesis of dissymmetric diaryl sulfides by nitrogen photoextrusion from diarylazo sulfides. The reaction is carried out “on water” without the need for (photo)catalysts or additives.
Hawraz Ibrahim M. Amin   +4 more
wiley   +1 more source

Sub-10 nm upconversion nanocrystals for long-term single-particle tracking. [PDF]

open access: yesNat Commun
Qiu X   +8 more
europepmc   +1 more source

Preparation of Enantioenriched Spirocyclic Scaffolds Transferring Axial Chirality from Borylalkylidenecycloalkanes

open access: yesChemistryEurope, EarlyView.
Enantiomerically enriched borylalkylidenecycloalkanes can transfer axial chirality to spirocyclic compounds with central chirality, without erosion of enantiomeric ratio. The method involves cyclopropanation, borylcyclopropanation, epoxidation, and aziridination reactions, that proceed in astereodivergent manner giving access to spirocycles with ...
Nerea Iragorri   +4 more
wiley   +1 more source

Nitrogen‐Centered Radical‐Directed C(sp3)−H Amination and Aminoalkylation Using (Diarylmethylene)amino Benziodoxolones

open access: yesChemistryEurope, EarlyView.
This report describes a C(sp3)−H aminofunctionalization via the photoexcitation of (diarylmethylene)amino benziodoxolones. These iodine reagents act as both single‐electron oxidants and nitrogen‐based SOMOphiles, serving as iminyl radicals, enabling the site‐selective C(sp3)−H amination and aminoalkylation of α‐aminoxy acid derivatives.
Kensuke Kiyokawa   +5 more
wiley   +1 more source

Photochemical Allylation of Aldehydes or Alkanes with Vinyl Cyclopropanes

open access: yesChemistryEurope, EarlyView.
An acylation or alkylation of vinyl cyclopropanes, employing tetra‐n‐butylammonium decatungstate as the photocatalyst, leading allyl ketones or alkenes is presented. A diverse range of substrates were compatible with this protocol, while flow conditions were also developed and mechanistic studies were also performed.
Naya A. Stini, Christoforos G. Kokotos
wiley   +1 more source

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