Results 51 to 60 of about 5,533 (176)

Harnessing Cooperative Energy Transfer and Hydrogen Atom Transfer for Direct Nitrogenations of Non‐Activated Alkanes

open access: yesAngewandte Chemie International Edition, Volume 65, Issue 3, 16 January 2026.
Cooperative EnT & HAT: New solution for direct C─N coupling of unactivated alkanes. Metal‐free photocatalytic nitrogenation. Use of unactivated alkanes. Original reaction pathway. Abstract While important progress has been achieved recently on direct functionalization of alkanes via photocatalytic methods, direct amination of aliphatic compounds ...
Sai Teja Kolla   +4 more
wiley   +1 more source

Total Synthesis of the Cyanobacterial Alkaloid Nostodione A

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 2, January 16, 2026.
The total synthesis of the alkaloid nostodione A is successfully achieved utilizing 3,4‐dihydrocyclopenta[b]indole‐1,2‐dione as a key intermediate. The sensitive benzylidene moiety is introduced via a Knoevenagel condensation with p‐hydroxybenzaldehyde.
Oscar F. Casadiego‐Díaz   +3 more
wiley   +1 more source

1,3-Dicarbonyl compounds in stereoselective domino and multicomponent reactions

open access: yes, 2010
International audienceModern organic synthesis focuses on the discovery and the development of stereoselective multiple bond-forming transformations allowing the creation of several covalent bonds in a single operation.
Bonne, Damien   +3 more
core   +4 more sources

ECOLOGICALY SAFE REAGENT RECYCCLING OF CARBON BISULPHIDE OF THE HEAD FRACTION OF BY PRODUCT COKE INDUSTRIES [PDF]

open access: yes, 2011
У статті розглянуто технологічні особливості виділення головної фракції сирого бензолу на сучасних коксохімічних виробництвах, проведено огляд наявних методів переробки головної фракції та утилізації сірковуглецю, запропоновано реагентний метод вилучення
Ранський, А. П.   +1 more
core  

Recent Advances in Asymmetric Organocatalyzed Conjugate Additions to Nitroalkenes [PDF]

open access: yes, 2017
The asymmetric conjugate addition of carbon and heteroatom nucleophiles to nitroalkenes is a very interesting tool for the construction of highly functionalized synthetic building blocks.
Alonso, Diego A.   +6 more
core   +3 more sources

Lubrication of space systems: Challenges and potential solutions [PDF]

open access: yes
Future space missions will all require advanced mechanical moving components which will require wear protection and lubrication. The tribology practices used today are primarily based upon a technology base that is more than 20 years old. This paper will
Fusaro, Robert L.
core   +1 more source

STEREOCHEMISTRY OF HEXENYL RADICAL CYCLIZATIONS WITH TERT-BUTYL AND RELATED LARGE GROUPS: SUBSTITUENT AND TEMPERATURE EFFECTS [PDF]

open access: yes, 2006
The long held notion that hexenyl radicals bearing large substituents on the radical carbon cyclize to give 1,2-trans-substituted cyclopentanes is experimentally disproved by study of the radical cyclization of an assortment of simple and complex ...
Tripp, Jonathan Clive
core  

Recent applications of gallium and gallium halides as reagents in organic synthesis [PDF]

open access: yes, 2015
This review highlights the application of gallium metal and gallium halides as reagents in organic synthesis. Owing to their unique catalytic properties, gallium trihalides are considered effective Lewis acids which can activate several functional groups
Gupta, Manoj K., O'Sullivan, Timothy P.
core   +1 more source

Lubricated Bearing Lifetimes of a Multiply Alkylated Cyclopentane and a Linear Perfluoropolyether Fluid in Oscillatory Motion at Elevated Temperatures in Ultrahigh Vacuum [PDF]

open access: yes
Bearing life tests in vacuum with three space liquid lubricants, two multiply alkylated cyclopentanes (MACs) and a linear perfluoropolyether (PFPE) were performed. Test conditions included: an 89 N axial load (mean Hertzian stress 0.66 GPa), vacuum level
Braza, Joseph   +2 more
core   +1 more source

Characterizing a lubricant additive for 1,3,4-tri-(2-octyldodecyl) cyclopentane: Computational study and experimental verification [PDF]

open access: yes, 2016
In order to increase the life of spacecraft, it is important to improve the comprehensive lubrication performance. Multiple alkylated cyclopentane (MAC) lubricants are presently gaining wide acceptance for actual space applications; adding extreme ...
Jingyan Nian   +4 more
core   +1 more source

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