Results 141 to 150 of about 46,343 (254)

Correction: Emerging insights into chemistry and therapeutic potentials of functionalized hexahydroquinolines. [PDF]

open access: yesFront Chem
Oduselu GO   +6 more
europepmc   +1 more source

Unraveling the Role of Lignin Oligomers Functionality for the Synthesis of Nonisocyanate Polyurethanes

open access: yesChemSusChem, Volume 19, Issue 15, 14 August 2026.
This study reports the synthesis of bio‐based nonisocyanate polyhydroxyurethanes from crude lignins and depolymerized lignin oligomers. The structure–properties relationships were largely explored and highlighted the key role of lignin functionality on the physical properties of the materials. Lignins are the main source of aromatic compounds in nature.
Nathan Wybo   +5 more
wiley   +1 more source

Enantioselective Synthesis of Axially Chiral Diaryl Ethers via Rhodium‐Catalyzed [2 + 2 + 2] Cycloaddition

open access: yesAngewandte Chemie, Volume 138, Issue 32, 3 August 2026.
An enantioselective rhodium‐catalyzed [2 + 2 + 2] cycloaddition enables the synthesis of axially chiral diaryl ethers. Carbonyl coordination ensures high reactivity and regioselectivity, affording products bearing up to four stereogenic axes with good enantio‐ and diastereoselectivity.
Yu Sato   +3 more
wiley   +2 more sources

The One‐Step Synthesis of Biologically Active Isochromans from Lignin‐Derived Aromatic Monomers in Tunable Deep Eutectic Solvents

open access: yesChemistry – A European Journal, Volume 32, Issue 30, 13 August 2026.
A straightforward one‐step protocol enables the synthesis of bio‐based and biologically active isochromans through the Oxa‐Pictet cyclization involving diverse aldehydes, including vanillin in combination with lignin‐derivable homovanillyl alcohol, a prominent aromatic platform chemical obtainable via diol‐assisted fractionation of lignocellulose ...
Anjali Kottayi   +6 more
wiley   +1 more source

Cationic Sulfonium‐Based Tripodal Ligand and Its Rh(I) Complexes

open access: yesChemistry – A European Journal, Volume 32, Issue 30, 13 August 2026.
We report a cationic EP3‐type tripodal ligand based on an aromatic sulfonium cation (E = S+) along with a series of its Rh(I) complexes. Structural, spectroscopic, electrochemical, and computational analyses of these complexes compared to isostructural analogs (E = Si− or P) reveal pronounced electron density depletion at Rh in the sulfonium congener ...
Nitsan Barel   +5 more
wiley   +1 more source

Flipping the Card With Enantiodivergent Organocatalysis

open access: yesChemistry – A European Journal, Volume 32, Issue 29, 7 August 2026.
This minireview elaborates on recent organocatalytic strategies for achieving enantiodivergence—the ability to access both product enantiomers using a single chiral catalyst. It highlights how achiral stimuli, such as solvent polarity and chemical additives, along with minimal catalyst modifications, trigger stereochemical inversions in reactions ...
Debora Iapadre   +3 more
wiley   +1 more source

Knoevenagel condensation of 4,5- and 1,8-diazafluorenes. [PDF]

open access: yesBeilstein J Org Chem
Cheshkina DS   +3 more
europepmc   +1 more source

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