Category: 17351-61-0

Chiarotto, Isabella published the artcileTetraethylammonium hydrogen carbonate: A cheap, efficient, and recyclable catalyst for transesterification reactions under solvent-free conditions, Recommanded Product: Tetraethylammonium hydrogencarbonate, the publication is Synthetic Communications (2016), 46(22), 1840-1847, database is CAplus.

Tetraethylammonium hydrogen carbonate (TEAHC) was proven to be an efficient catalyst for transesterification reactions in the absence of solvent. The reaction between isopropenyl or Et acetate and an alc. (not efficient in the absence of catalyst) was induced by the presence of TEAHC, which seems to assist the proton transfer from the alc. to the ester, yielding the corresponding acetate in very good yields in the absence of any solvent. Moreover, the TEAHC can be recycled several times without significant loss in activity.

Synthetic Communications published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C9H21NO3, Recommanded Product: Tetraethylammonium hydrogencarbonate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Zlatopolskiy, Boris D. published the artcileDiscovery of 7-[¹⁸F]Fluorotryptophan as a Novel Positron Emission Tomography (PET) Probe for the Visualization of Tryptophan Metabolism in Vivo, Quality Control of 17351-61-0, the publication is Journal of Medicinal Chemistry (2018), 61(1), 189-206, database is CAplus and MEDLINE.

Tryptophan and its metabolites are involved in different physiol. and pathophysiol. processes. Consequently, positron emission tomog. (PET) tracers addressing tryptophan metabolic pathways should allow the detection of different pathologies like neurol. disorders and cancer. Herein we report an efficient method for the preparation of fluorotryptophans labeled in different positions with ¹⁸F and their biol. evaluation. 4-7-[¹⁸F]Fluorotryptophans ([¹⁸F]FTrps) were prepared according to a modified protocol of alc.-enhanced Cu-mediated radiofluorination in 30-53% radiochem. yields. In vitro experiments demonstrated high cellular uptake of 4-7-[¹⁸F]FTrps in different tumor cell lines. 4, 5-, And 6-[¹⁸F]FTrps, although stable in vitro, suffered from rapid in vivo defluorination. In contrast, 7-[¹⁸F]FTrp demonstrated a high in vivo stability and enabled a clear delineation of serotonergic areas and melatonin-producing pineal gland in rat brains. Moreover 7-[¹⁸F]FTrp accumulated in different tumor xenografts in a chick embryo CAM model. Thus, 7-[¹⁸F]FTrp represents a highly promising PET probe for imaging of Trp metabolism

Journal of Medicinal Chemistry published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C6H13I, Quality Control of 17351-61-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Bartlett, Mairead E. published the artcileCu-Catalyzed Phenol O-Methylation with Methylboronic Acid, Quality Control of 17351-61-0, the publication is European Journal of Organic Chemistry (2021), 2021(41), 5661-5664, database is CAplus.

A Cu-catalyzed oxidative cross-coupling of phenols with methylboronic acid to form aryl Me ethers has been developed, expanding the scope of Chan-Evans-Lam alkylation. Electron-deficient phenol derivatives with a broad array of functional groups are methylated in high yields. Increased reaction temperature and catalyst loading enables the methylation of substrates incorporating pyridine and dihydroquinolone motifs. Electron-rich phenol derivatives are poor substrates for the methylation; the characterization of C-H homodimerization products formed from these substrates illuminates a competing mechanistic pathway.

European Journal of Organic Chemistry published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C9H21NO3, Quality Control of 17351-61-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Li, Rui published the artcileTris Chelating Phosphate Complexes of Bis(thio)urea Ligands, SDS of cas: 17351-61-0, the publication is Inorganic Chemistry (2013), 52(10), 5851-5860, database is CAplus and MEDLINE.

Two bisurea (L¹, L²) and one bisthiourea (L³) ligands were synthesized and their anion coordination behavior was studied. These ligands can readily form the tris chelates [PO₄(L)₃]^3- (1, 5, and 6) with phosphate ion (PO₄^3-) in the solid state, in which the anion is coordinated by six urea groups through 12 hydrogen bonds. Solution binding studies by ¹H NMR and UV-visible spectroscopy revealed different binding properties of the ligands toward phosphate ion. While the bis(p-nitrophenyl)-substituted bisurea L¹ retains the 3:1 (host to guest) binding ratio in solution, the di-Et derivative L² only forms 1:1 complex with phosphate ion. The more acidic thiourea L³ undergoes deprotonation/decomposition in the presence of phosphate ion. Also, the sulfate complex (2) of L¹ and bicarbonate (3) and carbonate (4) complexes of L² also were obtained, which show lower coordination numbers both in the solid state and in solution

Inorganic Chemistry published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C9H21NO3, SDS of cas: 17351-61-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Heo, Nam Jung published the artcileCapture and displacement-based release of the bicarbonate anion by calix[4]pyrroles with small rigid straps, SDS of cas: 17351-61-0, the publication is Chemical Science (2020), 11(31), 8288-8294, database is CAplus and MEDLINE.

Two-phenoxy walled calix[4]pyrroles 1 and 2 strapped with small rigid linkers containing pyridine and benzene, resp., have been synthesized. ¹H NMR spectroscopic analyses carried out in CDCl₃ revealed that both of receptors 1 and 2 recognize only F^– and HCO₃^– among various test anions with high preference for HCO₃^– (as the tetraethylammonium, TEA⁺ salt) relative to F^– (as the TBA⁺ salt). The bound HCO₃^– anion was completely released out of the receptors upon the addition of F^– (as the tetrabutylammonium, TBA⁺ salt) as a result of significantly enhanced affinities and selectivities of the receptors for F^– once converted to the TEAHCO₃ complexes. Consequently, relatively stable TEAF complexes of receptors 1 and 2 were formed via anion metathesis occurring within the receptor cavities. By contrast, the direct addition of TEAF to receptors 1 and 2 produces different complexation products initially, although eventually the same TEAF complexes are produced as via sequential TEAHCO₃ and TBAF addition These findings are rationalized in terms of the formation of different ion pair complexes involving interactions both inside and outside of the core receptor framework.

Chemical Science published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C9H21NO3, SDS of cas: 17351-61-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Teeter, T. E. published the artcileReduction of carbon dioxide on mercury cathodes, Application In Synthesis of 17351-61-0, the publication is Proc. 6th Meeting Intern. Comm. Electrochem. Thermodynam. and Kinet. (1955), 538-42, database is CAplus.

cf. C.A. 48, 10451g. A summary of polarographic work on solutions of CO₂ in quaternary ammonium salts, of cathodic polarization experiments with solutions of KCl, NH₄Cl, NaHCO₃, N(CH₃)₄Br, etc., through which CO₂ was continuously bubbled, and of electrolysis experiments showing that HCOOH was the chief product of CO₂ reduction on Hg cathodes. Current efficiencies of HCOOH production were as follows (all solutions 0.1M): KCl 99.8; KBr 99.9; KI 99.2; NaHCO₃ 99; N(CH₃)₄HCO₃ 100; N(C₂H₅)₄HCO₃ 97; N(C₃H₇)₄HCO₃ 85; N(C₄H₈)₄HCO₃ 78%. The HCO_3- was found to be unreducible, while CO₂ was either directly reduced or reduced by amalgams or H formed in primary cathodic processes.

Proc. 6th Meeting Intern. Comm. Electrochem. Thermodynam. and Kinet. published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C8H3BrCl2N2, Application In Synthesis of 17351-61-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Hoefler, Denis published the artcile1,1,3,3-Tetratriflylpropene (TTP): A Strong, Allylic C-H Acid for Bronsted and Lewis Acid Catalysis, Recommanded Product: Tetraethylammonium hydrogencarbonate, the publication is Angewandte Chemie, International Edition (2017), 56(5), 1411-1415, database is CAplus and MEDLINE.

Tetratrifylpropene (TTP) has been developed as a highly acidic, allylic C-H acid for Bronsted and Lewis acid catalysis. It can readily be obtained in two steps and consistently shows exceptional catalytic activities for Mukaiyama aldol, Hosomi-Sakurai, and Friedel-Crafts acylation reactions. X-ray analyses of TTP and its salts confirm its designed, allylic structure, in which the neg. charge is delocalized over four triflyl groups. NMR experiments, acidity measurements, and theor. investigations provide further insights to rationalize the remarkable reactivity of TTP.

Angewandte Chemie, International Edition published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C9H21NO3, Recommanded Product: Tetraethylammonium hydrogencarbonate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Jurcek, Ondrej published the artcileAnion Recognition by a Bioactive Diureidodecalin Anionophore: Solid-State, Solution, and Computational Studies, SDS of cas: 17351-61-0, the publication is Chemistry – A European Journal (2018), 24(32), 8178-8185, database is CAplus and MEDLINE.

Recent work has identified a bis-(p-nitrophenyl)ureidodecalin anion carrier as a promising candidate for biomedical applications, showing good activity for chloride transport in cells yet almost no cytotoxicity. To underpin further development of this and related compounds, a detailed structural and binding investigation is reported. Crystal structures of the transporter as five solvates confirm the diaxial positioning of urea groups while revealing a degree of conformational flexibility. Structures of complexes with Cl^–, Br^–, NO₃^–, SO₄^2- and AcO^–, supported by computational studies, show how the binding site can adapt to accommodate these anions. The ¹H NMR binding studies revealed exceptionally high affinities for anions in DMSO, decreasing in the order SO₄^2- > H₂PO₄^– ¡Ö HCO₃^– ¡Ö AcO^– >> HSO₄^– > Cl^– > Br^– > NO₃^– > I^–. Anal. of the binding results suggests that selectivity is determined mainly by the H-bond acceptor strength of different anions, but is also modulated by receptor geometry.

Chemistry – A European Journal published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C9H21NO3, SDS of cas: 17351-61-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Narayanam, Maruthi Kumar published the artcileRapid One-Step ¹⁸F-Labeling of Peptides via Heteroaromatic Silicon-Fluoride Acceptors, Safety of Tetraethylammonium hydrogencarbonate, the publication is Organic Letters (2020), 22(3), 804-808, database is CAplus and MEDLINE.

A new class of organosilicon-based radiosynthons, heteroaromatic silicon-fluoride acceptors, namely, HetSiFAs, that readily undergo isotope exchange with dry [¹⁸F]fluoride at room temperature in high radiochem. yield (up to 94%) with good molar activity is reported. Radiofluorination proceeds in a single step in 2 min without high-performance liquid chromatog. purification to provide an operationally simple method for ¹⁸F-PET tracer production This method was used to prepare an ¹⁸F-labeled com. tetrapeptide, and positron emission tomog. imaging confirmed in vivo stability.

Organic Letters published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C9H21NO3, Safety of Tetraethylammonium hydrogencarbonate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Yano, Masafumi published the artcileCalix[4]pyrrole-based anion transporters with tuneable transport properties, Computed Properties of 17351-61-0, the publication is Organic & Biomolecular Chemistry (2010), 8(19), 4356-4363, database is CAplus and MEDLINE.

Three new bis-1,2,3-triazole strapped calix[4]pyrroles have been prepared via click’ chem. and their anion complexation and lipid bilayer transport properties studied by a combination of single crystal X-ray diffraction studies, ¹H NMR titration techniques, isothermal titration calorimetry and lipid bilayer anion transport studies in POPC vesicles. Bilayer transport efficiency for transmembrane chloride transport was found to directly depend on the length of the alkyl chain present in the bis-triazole strap.

Organic & Biomolecular Chemistry published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C18H14BrNO5S2, Computed Properties of 17351-61-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia