Results 41 to 50 of about 14,177,191 (172)

Photocatalytic Vanadium‐Mediated Amination of Benzene With Hydroxylamine

open access: yesChemistry – A European Journal, Volume 32, Issue 22, 9 June 2026.
Photochemical activation of N‐phenylphenothiazine (PPT) enables a selective direct benzene amination with hydroxylamine in the presence of various vanadium catalysts under mild reaction conditions. Spectroscopic and kinetic analyses identify a key vanadium(IV)‐hydroxylamine intermediate, elucidate the crucial roles of the acidic medium, the ...
Dana Králová   +6 more
wiley   +1 more source

The Wonders of Vanilla: Celebrating the 150th Anniversary of Synthetic Vanillin

open access: yesChemFoodChem, Volume 2, Issue 2, June 2026.
The year 2024 marked the 150th anniversary of the first commercial production of vanillin, one of the world's most cherished flavor ingredients. This review traces vanilla's history from Mesoamerica to modern production methods, examines its composition, the discovery of vanillin and Haarmann's early synthesis compared to modern methods, and highlights
Elisabetta Brenna   +2 more
wiley   +1 more source

Benzenoid isomers with greatest and smallest Kekulé structure counts

open access: diamond, 2006
İvan Gutman   +3 more
openalex   +2 more sources

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