41014-75-9Relevant academic research and scientific papers
Evaluation of β-Aminocarboxylic Acid Derivatives in Hippocampal Excitatory Synaptic Transmission
Oliveira, Daniela R.,Luchez, Cibele V.,Bortolotto, Zuner A.,Fernandes, Jo?o P. S.
, (2017/11/10)
β-Aminocarboxylic acid derivatives (LINS04 series) were screened with the aim to explore their potential functional role in excitatory synaptic transmission in the central nervous system. We used field recordings in rat hippocampal slices to investigate the effects of the LINS04 series on the synaptic transmission at hippocampal CA1 synapses. We found that LINS04008 and LINS04009 increase the size of the evoked field excitatory postsynaptic potential (EPSP) in a dose-dependent manner. The concentration–response curve shows that the efficacy of LINS04008 is highest in the series (EC50 = 91.32 μM; maximum fEPSP 44.97%). The esters LINS04006 and LINS04005 did not affect the synaptic evoked activity. These data provide the first evidence of synaptic activity enhancement by these compounds and the importance of the acidic group to the activity. This set of data may provide direction for a strategic procedure to restore the glutamate synaptic transmission; however, further studies are needed to establish a more complete picture of how these molecules act on the glutamate transmission, which are in our mind for the next steps.
Calix[n]arenes: Active organocatalysts for the synthesis of densely functionalized piperidines by one-pot multicomponent procedure
Palermo,Sathicq,Liberto,Fernandes,Langer,Jios,Romanelli
supporting information, p. 2049 - 2054 (2016/04/26)
An efficient, suitable and high yielding method has been developed for the synthesis of different densely functionalized piperidine derivatives via pseudo-five component, one-pot domino reaction through a combination of β-ketoesters, aromatic aldehydes, and various amines using p-sulfonic acid calix[n]arenes as catalysts. The reaction was carried out in refluxing methanol, affording very good yields of the expected piperidine. Atomic economy, environmentally benign procedure, reuse of catalysts, and short reaction time are some of the important features of this protocol.
Three naphthalenedisulfonate polymers with imidazole-containing ligands: Synthesis, structure and heterogeneously catalytic performance in reactions of enamination of β-dicarbonyl compounds
Wang, Li,Liu, Jing,Guo, Hui,Deng, Dongsheng,Yao, Tian,Wang, Xingwei,Wang, Xinyi,Wu, Hongli
supporting information, p. 253 - 260 (2015/04/14)
Three new naphthalenedisulfonate polymers, [Cd(2,6-nds)(bib)]n (1), [Cd(1,5-nds)(bib)]n (2), and [Cu(2,6-nds)0.5(tpim)]n (3), have been successfully synthesized by hydrothermal reactions of corresponding metal salts with naphthalenedisulfonate (nds) and imidazole-containing ligands 1,4-bis(imidazol-1-ylmethyl)benzene (bib) and 2,4,5-tri(4-pyridyl)-imidazole (tpim). The structures of these polymers were determined by single crystal X-ray diffraction analysis. Polymers 1 and 2 crystallize in the same space group and have similar cell parameters, and thus show same three-dimensional (3D) framework architecture. Complex 3 has the same 2D layer structure. The photoluminescent properties of the complexes 1 and 2 were investigated. Catalytic tests indicate that complex 3 has chemo-and regio-selective catalytic activity towards enamination of β-ketoesters.
A new copper-based metal-organic framework as a promising heterogeneous catalyst for chemo- and regio-selective enamination of β-ketoesters
Zhao, Ying,Deng, Dong-Sheng,Ma, Lu-Fang,Ji, Bao-Ming,Wang, Li-Ya
supporting information, p. 10299 - 10301 (2013/10/22)
Assembly of 5-nitro-1,2,3-benzenetricarboxylic acid (H3nbta) with CuII in the presence of 1,3-bis(1,2,4-triazol-1-yl)propane (1,3-btp) leads to a new metal-organic framework, [Cu(Hnbta)(1,3-btp)] ·2H2O (A1), which is shown to be an efficient and recyclable heterogeneous catalyst for enamination of β-ketoesters with excellent product yields and selectivity.
P2W18O62·24H2O as an efficient and recyclable catalyst for the ecofriendly preparation of β-aminocrotonates
Sanchez, Laura M.,Sathicq, Angel G.,Baronetti, Graciela T.,Thomas, Horacio J.,Romanelli, Gustavo P.
, p. 137 - 142 (2013/06/05)
H6P2W18O62·24H 2O bulk-and silica-supported catalysts were found to be efficient and recyclable catalysts for the synthesis of a series of β-aminocrotonates using toluene as the solvent or under no solvent reaction conditions. Several substituted β-aminocrotonates can be prepared in very good yields and purity by direct reaction of amines and 1,3-dicarbonyl compounds in the presence of a catalytic amount of bulk-and silica-gel-supported H6P 2W18O62·24H2O. The title compounds were prepared in very good yields using both methodologies, and no secondary products were detected. The procedure using no reaction solvent resulted in a clean and useful alternative, which has the advantages of a greener methodology with operative simplicity, the use of a reusable and noncorrosive solid catalyst, soft reaction conditions, low reaction times, and good yields.
N1-{4-[(10S)-Dihydroartemisinin-10-oxyl]}phenylmethylene-N 2-(2-methylquinoline-4-yl)hydrazine derivatives as antiplasmodial falcipain-2 inhibitors
Luo, Wei,Liu, Yang,Wang, Jian,Guo, Chun,Lu, Wei-Qiang,Cui, Kun-Qiang
, p. 3073 - 3079,7 (2020/08/20)
A series of N1-{4-[(10S)-dihydroartemisinin- 10-oxyl]}phenylmethylene-N2-(2-methylquinoline-4-yl) hydrazine derivatives 9a-9n possessing 4-quinolylhydrazone and artemisinin cores were herein synthesized and evaluated for their activities against cysteine protease falcipain- 2 of Plasmodium falciparum. The structures were clearly confirmed by elemental analysis, 1H NMR, and mass spectra. The pharmacological results indicated that all compounds showed excellent activity against recombinant falcipain-2 (IC50 = 0.15-2.28 μM). The best one of this series was compound 9d (IC50 = 0.15 μM). The molecular docking results showed that the compound 9d made close contact with the key active site of cysteine protease falcipain-2.
Silica sulfuric acid-mediated synthesis of β-enaminones and β-enaminoesters under microwave irradiation
Datta, Bandita,Pasha
experimental part, p. 171 - 177 (2011/04/22)
Silica sulfuric acid, a heterogeneous reagent, has been found to be an efficient catalyst for the synthesis of β-enaminones and β-enaminoesters under microwave irradiation in a microwave reactor within 2 min. The experimental procedure is simple and environment-friendly, and results in excellent yields of the products. Further, the catalyst is recyclable, and the reaction is 60 times faster than the reaction at room temperature. Copyright Taylor & Francis Group, LLC.
Cyanuric chloride catalysed rapid conversion of β-ketoesters into β-enaminoesters under mild and solvent-free conditions
Kamble,Joshi,Atkore
experimental part, p. 616 - 621 (2012/07/03)
Cyanuric chloride is shown to be an extremely efficient catalyst for the synthesis of β-enaminoesters from β-ketoesters under solvent-free conditions by grinding in a mortar with pestle at 25 °C. A short reaction time, an inexpensive and easily available catalyst, mild reaction conditions and excellent yields of the products are attractive features of this methodology.
A facile, chemoselective and eco-friendly solid phase synthesis of enaminones catalyzed by L-Proline
Bhupathi, Raja S.,Devi, B.Rama,Dubey
experimental part, p. 5521 - 5524 (2012/07/13)
A facile and chemoselective method for the synthesis of enaminones by the reaction of aromatic primary amines with various β-ketoesters in the presence of L-proline as activator under solid phase is described. The reactions are promoted by the catalyst in short time (5-6 min) under ambient conditions, without any side products.
Stereodefined homopropargyl amines by tandem nucleophilic addition/fragmentation of dihydropyridone triflates
Tummatorn, Jumreang,Dudley, Gregory B.
supporting information; experimental part, p. 158 - 160 (2011/03/20)
Dihydropyridone (DHPD) triflates undergo nucleophile-triggered fragmentation to provide homopropargyl amine derivatives, the stereochemistry of which is defined by starting from readily available β-amino esters.
