Results 171 to 180 of about 762 (245)

1,1‐Disubstituted Vinylbromides: Versatile Building Blocks for the Synthesis of Nitrogen‐Containing Heterocycles

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 23, 16 June 2026.
1,1‐Disubstituted vinylbromides are key intermediates for constructing nitrogen‐containing heterocycles. This review provides an overview of the synthetic applications of 1,1‐disubstituted vinylbromides and summarizes recent developments in reaction methodologies, mechanistic insights, and the structural diversity of N‐heterocyclic compounds accessible
Anne Westermeyer   +6 more
wiley   +1 more source

Schwefel‐gesteuerter Aufbau von Vinylcyclopropanen ausgehend von 1,3‐Dienen

open access: yesAngewandte Chemie, Volume 138, Issue 25, 15 June 2026.
Schwefel übernimmt die Kontrolle: Ein Thioether wirkt als molekularer Dirigent, der die Carbenaddition an 1,3‐Diene mit außergewöhnlicher Regio‐ und Diastereokontrolle lenkt. Dabei werden schwefelhaltige Vinylcyclopropane (S‐VCPs) erhalten, die mittels herkömmlicher Methoden nur schwer zugänglich sind.
Anna Keimer   +6 more
wiley   +1 more source

Sulfur‐Directed Construction of Vinyl Cyclopropanes from 1,3‐Dienes

open access: yesAngewandte Chemie International Edition, Volume 65, Issue 25, 15 June 2026.
Sulfur takes control. A pending thioether acts as a molecular compass, directing carbene addition to the 1,3‐diene scaffold with exceptional regio‑ and diastereocontrol to forge sulfur‐substituted vinyl cyclopropanes (S‐VCPs) — molecular architectures inaccessible via conventional cyclopropanation strategies.
Anna Keimer   +6 more
wiley   +1 more source

Bovine tuberculosis history as a risk factor for recurrence in English cattle herds experiencing a breakdown

open access: yesVeterinary Record, Volume 198, Issue 12, Page e533-e542, 13–27 June 2026.
Abstract Background Bovine tuberculosis (TB) threatens cattle farming in England. Supplementing tuberculin skin testing with the interferon‐gamma blood test during TB incident (breakdown) management can enhance diagnostic sensitivity. We aimed to identify herds at greater risk of recurrence depending on their recent TB history to inform targeted ...
Daisy Duncan   +5 more
wiley   +1 more source

Synthesis and Reactivity of Extremely Electron‐Poor Au(III) Complexes Bearing OTf− or NTf2− Ligands

open access: yesChemistry – A European Journal, Volume 32, Issue 22, 9 June 2026.
A new family of electron‐poor Au(III) cations bearing bistriflimide or triflate ligands is reported. These cations can undergo direct C─H metalation with simple arenes to give mono‐aryl cations. Subsequent addition of simple halide sources allows for reductive elimination of aryl halides, formally from Ar─H and X−. ABSTRACT The synthesis and structural
Lachlan Barwise   +6 more
wiley   +1 more source

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