Results 91 to 100 of about 25,792 (269)
Synthesis and transformation of halochromones [PDF]
, 2014 Chromones (4H-1-benzopyran-4-ones) are one of the most abundant groups of naturally occurring oxygen containing heterocyclic compounds possessing a benzo-γ-pyrone framework, 1a.
Santos, Clementina M.M. +2 more
core +1 more source
Chemistry – A European Journal, EarlyView.The synthesis of 2‐methyl propellane and its conversion to various 1,2‐ and 1,2,3‐di‐ and trisubstituted bicyclopentanes is reported. Abstract Bicyclo[1.1.1]pentanes (BCPs) have emerged as isosteric replacements for mono‐ and para‐substituted benzene rings in medicinal and materials applications, involving substitution at the BCP bridgehead (1,3 ...
Sean R. Verschaeve +4 more
wiley +1 more source
Beilstein Journal of Organic ChemistryA series of 2,3-dihalo-1,1,1,4,4,4-hexafluorobutanes and 2-halo-1,1,1,4,4,4-hexafluorobut-2-enes were prepared from commercially available hydrofluoroolefins 1,1,1,4,4,4-hexafluorobut-2-enes and their 1H, 19F and 13C chemical shifts measured.
Nataliia V. Kirij +4 more
doaj +1 more source
Chemistry – A European Journal, EarlyView.The study of the Diels–Alder reaction of cinnamaldehyde and cyclopentadiene, catalyzed by chiral imidazolidine‐4‐thiones, led to the discovery of a highly regio‐ and stereoselective Michael‐addition and consecutive ring closure. Here, the imidazolidine‐4‐thione not only catalytically activates cinnamaldehyde but also participates as the nucleophile to ...
Marian S. R. Ebeling +5 more
wiley +1 more source
Chemistry – A European Journal, EarlyView.ABSTRACT We explored aryl thianthrenation as a tool for directly incorporating multiple isotopes into molecular scaffolds starting from full isotopically labeled benzene. Stable isotope‐labeled (SIL) molecules are indispensable tools for investigating chemical and biological mechanisms and quantifying metabolites.
Alexandre Labiche +7 more
wiley +1 more source
Molecules, 2016 The efficiency of direct conversion of tertiary alcohols bearing a β-hydrogen atom to vicinal halohydrins—chlorohydrins and bromohydrins—under green reaction conditions was tested preliminarily on model tertiary benzyl alcohols.
Njomza Ajvazi, Stojan Stavber
doaj +1 more source
Method and apparatus for vapor detection [PDF]
, 1980 The method disclosed herein may be practiced by passing the vapors to be sampled along a path with halogen vapor, preferably chlorine vapor, heating the mixed vapors to halogenate those of the sampled vapors subject to halogenation, removing unreacted ...
Erikson, Charles M. +4 more
core +1 more source
Silent Partners in the Mill: Unveiling the Role of Additives in Mechanochemical Synthesis
Chemistry – A European Journal, EarlyView.Mechanochemistry offers a sustainable, solvent‐free alternative to traditional synthesis, often enhanced by additives in a process known as additive‐assisted grinding. This review discusses how various additives, including liquids, ionic solids, and advanced materials like ionic liquids and piezoelectric compounds, improve reaction efficiency ...
Johanna Breinsperger +3 more
wiley +1 more source
A new software application for footwear industry [PDF]
, 2007 Today, the footwear industry is facing many challenges. First, consumers demand for new products with better comfort and design; second, competition is becoming stronger in current global market.
Fonseca, Jaime C., Vilaça, João L.
core +1 more source
Enhancing the Chemical Reactivity of Graphene through Substrate Engineering
Small, EarlyView.This review highlights methods to enhance the reactivity of graphene through substrate engineering, focusing on strain and charge doping. Strains induced by nanoparticles, metal crystal orientations, or stretchable polymers increase the reactivity of graphene.
Jia Tu, Mingdi Yan
wiley +1 more source