Results 141 to 150 of about 13,728 (257)

Control over stereogenic centres beyond tetracoordination. [PDF]

Chem Sci
Budeev A, Sparr C.
europepmc   +1 more source

Racemisation of Amino Acids: From Synthetic Challenge to Biological Significance

ChemBioChem, Volume 27, Issue 11, 15 June 2026.
Racemisation, once considered an undesirable synthetic side reaction, also occurs naturally in amino acids and influences biological processes. Evidence links stereochemical conversion to ageing, protein turnover, and cellular development. This review examines mechanisms, control strategies in synthesis, applications and implications in physiology ...
Othman Al Musaimi
wiley   +1 more source

Exploiting spatial isomerism to modulate the assembled phase and rheological response of compositionally identical sugar-based surfactants. [PDF]

Chem Sci
Poon JF, Cabezón A, Gulotta A, Mahmoudi N, Ulvenlund S, Garcia-Fandiño R, Sanchez-Fernandez A.   +6 more
europepmc   +1 more source

Structural Basis for Nucleobase Activation by the Adenine DNA Glycosylase MutY

ChemBioChem, Volume 27, Issue 11, 15 June 2026.
DNA glycosylase MutY engages its adenine nucleobase substrate in a syn orientation with a catalytic Glu. X‐ray crystal structures of MutY with Glu replaced suggest that a disengaged “on hold” state with anti nucleobase orientation may explain how MutY avoids catastrophic activity at inappropriate adenines.
L. Peyton Russelburg, Merve Demir, Karina Cedeno, Sheila S. David, Martin P. Horvath   +4 more
wiley   +1 more source

Catalytic asymmetric construction of remote P or other heteroatom (Si/S) stereogenic axially chiral scaffolds. [PDF]

Chem Sci
Liu W, Ling Z, Liu YZ, Deng WP.
europepmc   +1 more source

Targeting of Staphyloxanthin and α‐Hemolysin by Natural Compound L‐Malic Acid Suppresses Staphylococcus aureus Virulence

The FASEB Journal, Volume 40, Issue 11, 15 June 2026.
L‐malic acid, a natural TCA cycle intermediate, attenuates the virulence of Staphylococcus aureus through dual metabolic and regulatory mechanisms. It redirects central carbon flux away from the mevalonate pathway and inhibits the key enzyme CrtO, suppressing staphyloxanthin biosynthesis and impairing bacterial resistance to oxidative stress ...
Li Shen, Bingjie Wang, Jinjin Yang, Xinru Yuan, Zhixuan Chen, Can Yang, Jiana Fu, Haojin Gao, Weihua Han, Junhong Shi, Fangyou Yu, Jingyi Yu   +11 more
wiley   +1 more source

Convergent Total Synthesis of 16β‐Hydroxylpseudobufarenogin

Angewandte Chemie, Volume 138, Issue 23, 1 June 2026.
We present a novel convergent strategy that integrates Pd/Ag‐promoted Suzuki–Miyaura coupling with Ir‐catalyzed radical‐relay cyclization, enabling the first total synthesis of 16β‐hydroxylpseudobufarenogin. This approach is broadly applicable to the total synthesis of various oxygenated bufadienolides by simply modifying the fragment structures ...
Wataru Shigematsu, Yo Matsumoto, Koichi Hagiwara, Masayuki Inoue   +3 more
wiley   +2 more sources

Airborne PET nanoplastics alter tobacco's chemical risk. [PDF]

Proc Natl Acad Sci U S A
Tan MM, Sun XD, Wang Y, Duan JL, Ma JY, Liu XY, Liu MY, Sun YC, Xing RX, Wang SG, Chen W, Yuan XZ.   +11 more
europepmc   +1 more source

Benzo[cd]azulenyl: A Structural Isomer of Phenalenyl—Synthesis and Properties of Its Tri‐tert‐butyl‐substituted Derivative and Formation of a Thermal‐ and Photoresponsive σ‐Dimer

Chemistry – A European Journal, Volume 32, Issue 22, 9 June 2026.
Benzo[cd]azulenyl, a nonalternant isomer of phenalenyl, is identified as a new member of the nonalternant hydrocarbon radical family. The tri‐tert‐butyl substituted derivative forms a stable σ‐dimer in the solid state. Upon exposure to external stimuli such as light and heat, the σ‐bond of the dimer dissociates, producing the monomeric radical.
Kaho Takeuchi, Akihito Konishi, Makoto Yasuda   +2 more
wiley   +1 more source

Enantioselective Tandem Povarov/Urech–Read Reaction for the Synthesis of Dihydroquinoline/Hydantoin Hybrids

Advanced Synthesis &Catalysis, Volume 368, Issue 11, 3 June 2026.
Herein, an organocatalytic asymmetric synthesis of dihydroquinoline/hydantoin hybrids is described. The synthetic protocol involves a tandem reaction comprising a phosphoric acid–catalyzed initial Povarov dimerization of in situ generated imine/enamine mixtures under tautomeric equilibrium, followed by a Urech–Read reaction of the 1,2‐dihydroquinoline ...
Zuriñe Serna‐Burgos, Xabier del Corte, Ainara Pellicer‐Rivera, Adrián López‐Francés, Jesús M. de los Santos, Javier Vicario   +5 more
wiley   +1 more source