Results 51 to 60 of about 3,191 (185)

Azirinium ylides from α-diazoketones and 2H-azirines on the route to 2H-1,4-oxazines: three-membered ring opening vs 1,5-cyclization

Beilstein Journal of Organic Chemistry, 2015
Strained azirinium ylides derived from 2H-azirines and α-diazoketones under Rh(II)-catalysis can undergo either irreversible ring opening across the N–C2 bond to 2-azabuta-1,3-dienes that further cyclize to 2H-1,4-oxazines or reversibly undergo a 1,5 ...
Nikolai V. Rostovskii, Mikhail S. Novikov, Alexander F. Khlebnikov, Galina L. Starova, Margarita S. Avdontseva   +4 more
doaj   +1 more source

Actinomycin Derivatives: Structural Diversification and Biological Activities

ChemMedChem, Volume 21, Issue 15, 14 August 2026.
Actinomycins are chromopeptide antibiotics exhibiting remarkable structural diversity and broad bioactivity. This review traces their development from naturally occurring D‐, X‐, A‐, G‐, Y‐, and Z‐type analogs to precursor‐directed, synthetic, and semisynthetic derivatives.
Özge Can, Erdal Bedir
wiley   +1 more source

Accessing Heterocycle‐Containing Borazine Frameworks via C−H Functionalization Reactions of Heterocycles

European Journal of Organic Chemistry, Volume 29, Issue 29, 7 August 2026.
A Pd/Cu cooperative catalytic system enables the direct C–H functionalization of a diverse range of five‐membered and benzo‐fused heterocycles with iodinated hexaarylborazines, providing efficient access to previously inaccessible heterocycle‐functionalized borazines.
Fan Huang, Giulia Brufani, Ejdi Cela, Alireza Nazari Khodadadi, Dario Marchionni, Luigi Vaccaro   +5 more
wiley   +1 more source

Microhydration Structures of Protonated Oxazole [PDF]

The Journal of Physical Chemistry A, 2019
The initial microhydration structures of the protonated pharmaceutical building block oxazole (Ox), H+Ox-Wn≤4, are determined by infrared photodissociation (IRPD) spectroscopy combined with quantum chemical dispersion-corrected density functional theory calculations (B3LYP-D3/aug-cc-pVTZ).
Kuntal Chatterjee, Otto Dopfer
openaire   +2 more sources

Brain‐Wide Mapping and Synaptic Localization of C1QL3 Using a Novel Epitope‐Tagged Knock‐In Mouse

Journal of Comparative Neurology, Volume 534, Issue 8, August 2026.
C1QL3 is a secreted adhesion molecule that acts as a key regulator of synaptic structure and function. We generated and validated a novel epitope‐tagged knock‐in mouse line (C1ql32HA) in which two hemagglutinin (HA) epitopes were inserted near the N‐terminus of the endogenous C1QL3 protein.
William P. Armstrong IV, James M. Salvatore, Matthew J. Sticco, Keaven Caro, J. Wesley Maddox, Angie Huang, Brenna C. McAllister, Christopher B. O'Connell, Siu‐Pok Yee, Amy Lee, Susanne Ressl, David C. Martinelli, Alexander C. Jackson   +12 more
wiley   +1 more source

Solid Phase versus Solution Phase Synthesis of Heterocyclic Macrocycles

Molecules, 2013
Comparing a solution phase route to a solid phase route in the synthesis of the cytotoxic natural product urukthapelstatin A (Ustat A) confirmed that a solid phase method is superior.
Shelli R. McAlpine, Seong Jong Kim
doaj   +1 more source

Azole‐Based Diarylbenzenes for Molecular Solar Thermal Energy Storage: A Computational Analysis

ChemistrySelect, Volume 11, Issue 29, 3 August 2026.
Diarylethenes containing aromatic π‐linkers have attracted research interest in recent years owing to their potential applications in molecular solar thermal (MOST) energy storage systems. In this work, we demonstrate that replacing the thienyl core of diarylbenzenes with an oxazole core and introducing lateral alkyl‐substituents on the oxazole core ...
Thillaiarasi Sukumar, M. V. R. Akshay Sampath, D. Bala Karuna Kumar, Bhagyashri Devaru Bhat, Mahesh Kumar Ravva, Baswanth Oruganti   +5 more
wiley   +1 more source

Deactivation Pathways in 2‐Ferrocenylmethyl‐5‐Aminoxazoles Synthesized via Ugi–Zhu Reaction: A Dewar–Chatt–Duncanson‐Type Interaction

ChemistrySelect, Volume 11, Issue 29, 3 August 2026.
The synthesis and full characterization are reported of 15 new ferrocenyl‐containing oxazoles via the Ugi–Zhu reaction, which is a special kind of MCR versatile to synthesize different types of heterocycles and polyheterocycles, and the DFT‐based study is performed using a high level of theory to rationalize the reactivity of synthesized compounds ...
Carlos E. Garduño‐Albino, Roberto E. Blanco‐Carapia, Ricardo Alfredo Luna‐Mora, Humberto Laguna‐Galindo, Eduardo González‐Zamora, Alejandro Islas‐Jácome   +5 more
wiley   +1 more source

Synthesis of some Heterocyclic Compounds Derived from

مجلة بغداد للعلوم, 2013
The 4-(?-bromo acetyl)-4?-toluene sulfonanilide (2) was used as key intermediate to synthesize new heterocyclic compounds. This bromo compound was synthesized via sulfonation of amino group of p-amino acetophenone using Hinsburg method with 4-toluene ...
Baghdad Science Journal
doaj   +1 more source

Heterogeneous Organocatalytic Synthesis of Propargylic Esters Using a Polymer‐Supported N‐Heterocyclic Carbene

ChemSusChem, Volume 19, Issue 14, 29 July 2026.
A vinyl addition polynorbornene (VA‐PNB)‐supported N‐Heterocyclic carbene precatalyst is successfully used in the metal‐free coupling of terminal alkynes, carbon dioxide, and chlorides toward propargylic esters. The conversion of carbon dioxide into high‐value chemical scaffolds is a central challenge in modern green chemistry. In this study, we report
Dimitrios K. Giannopoulos, Entzy Kaplanai, Carlos Lendínez, Sozan N. Abdullah, Ana C. Albéniz, Georgios C. Vougioukalakis   +5 more
wiley   +1 more source