38112-59-3Relevant articles and documents
Active Base Hybrid Organosilica Materials based on Pyrrolidine Builder Units for Fine Chemicals Production
Llopis, Sebastián,Velty, Alexandra,Díaz, Urbano
, p. 5012 - 5024 (2021/10/19)
The catalytic activity of “pyrrolidine type” fragments included or anchored in the mesoporous silica supports or polymeric frameworks have been fully reported for enantioselective transformation. Nevertheless, low attention was focused on their catalytic abilities to perform base-catalyzed reaction. Accordingly, hybrid materials including pyrrolidine fragments in the mesoporous silica supports were prepared following different synthesis methods, such as micellar and fluoride sol-gel routes in absence of structural directing agents. Their great catalytic performance was explored for various base-catalyzed reactions to the formation of C?C bond through Knoevenagel, Claisen-Schmidt and Henry condensations under microwave irradiation. The benefits of microwave irradiation combined with suitable catalytic properties of pyrrolidine hybrid materials with strong base sites and high accessibility to active centers, allowed carrying out successfully base-catalyzed condensation reactions for the production of fine chemicals. Moreover, the hybrid catalyst exhibited high selectivity and good stability over different catalytic cycles contributing to environmental sustainability.
Solvent-free, one-pot synthesis of α,β-unsaturated esters in the presence of a C3-symmetric arsine
Wang, Changqing,Yang, Liu,Zhou, Rong,Mei, Guangquan
supporting information, p. 1074 - 1079 (2016/07/16)
An efficient synthesis of α, β-unsaturated esters is achieved via a one-pot reaction in the presence of a C3-symmetric arsine. The key advantages are the short reaction time, simple workup, mild reaction conditions, and high yields.
Liquid chromatography/electrospray ionisation mass spectrometric tracking of 4-hydroxy-2(E)-nonenal biotransformations by mouse colon epithelial cells using [1,2-13C2]-4-hydroxy-2(E)-nonenal as stable isotope tracer
Jouanin,Baradat,Gieules,Tache,Pierre,Gueraud,Debrauwer
scheme or table, p. 2675 - 2681 (2012/03/10)
4-Hydroxy-2(E)-nonenal (HNE), a product of lipid peroxidation, has been extensively studied in several areas, including metabolism with radio-isotopes and quantification in various matrices with deuterium-labelled HNE as standard. The aim of this work was to evaluate the relevance of 13C-labelled HNE in biotransformation studies to discriminate metabolites from endogens by liquid chromatography/electrospray ionisation mass spectrometry (LC/ESI-MS). 13C-Labelled HNE was synthesised inimproved overall yield (20%), with the incorporation of two labels in the molecule. Immortalisedmouse colon epithelial cells were incubated with 2:3 molar amounts of HNE/13C-HNE in order to gain information on the detection of metabolites in complex media. Our results demonstrated that the stable isotope m/z values determined by mass spectrometry were relevant in distinguishing metabolites from endogens, and that metabolite structures could be deduced. Six conjugate metabolites and 4-hydroxy-2(E)-nonenoic acid were identified, together with an incompletely identified metabolite. Stable-isotope-labelled HNE has already been used for quantification purposes. However, this is the first report on the use of 13C-labelled HNE as a tracer for in vitro metabolism. 13C-Labelled HNE could also be of benefit for in vivo studies. Copyright
