Results 31 to 40 of about 117,935,502 (148)

Triptindane‐9,10,11‐triol: Threefold Hydride Transfer from Lithium Aluminum Hydride as the Key Step to C3‐Symmetrically Trifunctionalized Tribenzo[3.3.3]propellanes

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 15, 22 April 2026.
Threefold reduction of 9,10,11‐triptindanetrione with LiAlH4 or NaBH4 yields exclusively the C3‐symmetric triol, suggesting an intracomplex (“rolling”) mechanism. However, use of LiAlH4/LiAlD4 (1 : 1) reveals a preceding hydride exchange. Mechanistic implications are discussed including the reduction of the related diketone.
Thorsten Hackfort   +5 more
wiley   +1 more source

Copper‐Catalyzed Intramolecular Hydrophosphorylation of Alkynes: Straightforward Regio‐ and Stereoselective Access to Six‐Membered Phosphorus Heterocycles

open access: yesEuropean Journal of Organic Chemistry, Volume 28, Issue 48, December 22, 2025.
Ready access to six‐membered phosphorus heterocycles through copper‐catalyzed intramolecular hydrophosphorylation of ortho‐alkynyl secondary phosphine oxides is described. The reaction proceedes with high regio‐ and stereoselectivity. An atom‐economic copper‐catalyzed intramolecular hydrophosphorylation of ortho‐alkynyl secondary phosphine oxides ...
Hamdi Sanaa   +3 more
wiley   +1 more source

The Monte Carlo Program KKMC, for the Lepton or Quark Pair Production at LEP/SLC Energies—Updates of electroweak calculations

open access: yes
Since the KKMC program was published for the first time over 20 years ago, it has gained popularity and was exploited in a broad spectrum of applications. The core part of the program itself did not change much.
Arbuzov, A
core   +1 more source

""Dali a trouve son Samson""

open access: yes, 2020
About the book Dali de Gala by Robert ...
n/a
core  

Isomerized Conjugated Molecules as Hole‐Selective Contacts for Inverted Perovskite Solar Cells

open access: yesSmall Structures, Volume 6, Issue 12, December 2025.
A BTBT (benzothieno[3,2‐b]benzothiophene) isomeric derivative, (2‐(benzo[b]benzo[4,5]thieno[2,3‐d]thiophen‐4‐yl)ethyl)phosphonic acid (BTBT‐Z), is reported. BTBT‐Z adopts a zig‐zag configuration with a sulfur opposite to the anchoring group. This structure enhances its interaction with the perovskite layer, improving crystallization and thin‐film ...
Qingqing Liu   +18 more
wiley   +1 more source

1,3‐Diazetidin‐2‐Ones: Synthetic Approaches and Therapeutic Promise within the Aza‐β‐Lactam Family

open access: yesEuropean Journal of Organic Chemistry, Volume 28, Issue 43, November 24, 2025.
This review explores the synthesis, reactivity, and therapeutic potential of 1,3‐diazetidin‐2‐ones—an underexplored class of aza‐β‐lactams. Emphasis is placed on synthetic challenges, emerging methodologies, and their promise as β‐lactamase‐resistant scaffolds in medicinal chemistry. 1,3‐diazetidin‐2‐ones, overlooked members of the aza‐β‐lactam family,
Jozef Kristek, Jiří Pospíšil
wiley   +1 more source

N/A

open access: yes, 1930
Me permito en este modesto trabajo, convencido de la importancia de un mejor cultivo del café, hacer ligeros apuntes sobre algunos capítulos de su cultivo, he escogido capítulos de interés primordial; semilleros y almácigos de café es un problema ...
López G., Aurelio
core   +3 more sources

Synthesis of Diaryl‐ and Dialkynylphosphinates From Ubiquitous PV Sources via a Redox‐Neutral Approach

open access: yesAdvanced Science, Volume 12, Issue 36, September 25, 2025.
Classical strategies for P─C bond formation rely on precursors (e.g., PH3, H2PO2, PCl3) obtained from P4, which is produced via the energy‐intensive thermal process. Here, an alternative, redox‐neutral approach is explored. Primary phosphate sources are activated with triflic anhydride (Tf2O) and 4‐dimethylaminopyridine (DMAP) to a versatile PV ...
Tobias Schneider   +5 more
wiley   +1 more source

N/A

open access: yes, 1928
La inspección de los mercados es otra de las funciones de policía alimentaria encomendada a los veterinarios municipales, misión, compleja por que recae en un número grande y variado de sustancias alimenticia y e n condiciones adversas.
Villegas L., José J.
core   +1 more source

PURIFICATION OF THE HEAT-ELECTRIC GENERATING STATION FLUE GASES OF SULFUR AND NITROGEN OXIDES

open access: yesЛитьë и металлургия, 2009
Technological schema of furnace gases cleaning of ash and sulfur and nitric oxides, allowing to reach maximum degree of cleaning at minimum costs, is ...
V. A. Arbuzov   +3 more
doaj  

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