Results 51 to 60 of about 1,302 (146)

Ligações hidrogênio fortes em ácidos dicarboxílicos e diaminas aromáticas

Química Nova, 2000
A very short-strong hydrogen bond (20kcal/mol) is found in the monoanion of certain dicarboxylic acids derived from maleic and dialkylmalonic acids. Certain aromatic diamines that are known as proton sponge have exceptionally high basicity (pKa) and are ...
Rodrigues José Augusto R.
doaj  

Controllable Modulation of Interactive Site Spacing in Porous Coordination Cages: A Key to Substantial Synergistic Catalysis Enhancement

Small Structures, Volume 7, Issue 3, March 2026.
This work presents a ligand‐engineering strategy to controllable program the spatial proximity between Brønsted acidic (μ4–H2O) and basic (–NH2) sites within isostructural calixarene‐based Co4 cages. Reducing the intersite distance from 12.4 Å to 5.6 Å leads to a nonlinear surge in Knoevenagel condensation activity.
Yaoyao Peng, Yujiao Mo, Gongfu Xie, Yu Liang, Jing Chen, Yu Fang   +5 more
wiley   +1 more source

Coupled on‐line in crystallo UV–Vis absorption spectroscopy and X‐ray crystallography to compare specific radiation damage in metal‐containing proteins at room versus cryogenic temperature

Acta Crystallographica Section D, Volume 82, Issue 3, Page 187-198, March 2026.
We used on‐line in crystallo UV–Vis absorption spectroscopy in conjunction with X‐ray crystallography on beamline BM07‐FIP2 at the ESRF to compare the structural effects of specific radiation damage on two different metal‐containing proteins at either room or cryogenic temperature.Specific radiation damage (SRD) to proteins is a pertinent issue ...
Nicolas Caramello, Samuel L. Rose, Eric Mathieu, Lucas Petit, Ivo Tews, Sylvain Engilberge, Antoine Royant   +6 more
wiley   +1 more source

Enantioselective Addition of Dialkyl Malonates to β-Arylethenesulfonyl Fluorides under High-Pressure Conditions. [PDF]

Org Lett, 2023
Kopyt M, Tryniszewski M, Barbasiewicz M, Kwiatkowski P.   +3 more
europepmc   +1 more source

Erratum: Further correction: Reductive annulations of arylidene malonates with unsaturated electrophiles using photoredox/Lewis acid cooperative catalysis. [PDF]

Chem Sci
Betori RC, McDonald BR, Scheidt KA.
europepmc   +1 more source

Mechanistic Elucidation and Stereochemical Consequences of Alternative Binding of Alkenyl Substrates by Engineered Arylmalonate Decarboxylase. [PDF]

J Am Chem Soc
van der Pol E, Schlatzer T, Hoffka G, Di Geronimo B, Eder J, Schweiger AK, Karava M, Gross D, Fischer RC, Kracher D, Kazlauskas R, Miyamoto K, Kamerlin SCL, Breinbauer R, Kourist R.   +14 more
europepmc   +1 more source

Three Component Cascade Reaction of Cyclohexanones, Aryl Amines, and Benzoylmethylene Malonates: Cooperative Enamine-Brønsted Acid Approach to Tetrahydroindoles. [PDF]

ACS Omega, 2022
Cortes Vazquez J, Alharbi WS, Davis J, Moore A, Nesterov VN, Cundari TR, Wang H, Luo W.   +7 more
europepmc   +1 more source

DoE-Based Optimization of a Photocatalytic C‑Alkylation Reaction in a 3D-Printed Photoreactor. [PDF]

ACS Sustain Chem Eng
Richter D, Gémes G, Hangya KI, Komka K, Kisszékelyi P, Gömöry Á, Drahos L, Kupai J.   +7 more
europepmc   +1 more source

Arene activation via π-bond localization: concepts and opportunities. [PDF]

Beilstein J Org Chem
Meiners P, Melder JJ, Morack T.
europepmc   +1 more source

Recyclable Ligand-Free Cobalt Catalyst for Alkoxycarbonylation of Chloroacetates. [PDF]

ChemSusChem
Wang W, Cao Z, Hu Y, Sang R, Kong Q, Xue Q, Zhang B.   +6 more
europepmc   +1 more source