Diaza-18-crown-6- ether

Host: Guest chemistry of diaza-18-crown-6: Selective precipitation from mixtures of oligohydroxy phenols and the structures of five host: Guest complexes. Journal of Inclusion Phenomena 1988 , …

text.skipToContent text.skipToNavigation. TCI uses cookies to personalize and improve your user experience. By continuing on our website The synthesis of four diaza-18-crown-6 ethers with C2 -symmetry derived from trans - (R, R)-1,2-diaminocyclohexane bearing methyl, phenyl and phenoxymethyl moeities attached to a stereogenic centre on the crown ring were achieved. Practical syntheses of versatile building blocks of crown ethers 1 and 2, chiral amine precursors 3–6 and chiral diaza 18-crown-6 ethers 7–12 are reported starting from chiral amines. A series of N, N ‘-dialkyl-4,13-diaza-18-crown-6 lariat ethers possessing two C 8 H 17 (2), (CH 2) 3 C 8 F 17 (3), (CH 2) 3 C 10 F 21 (4), and (CH 2) 2 C 8 F 17 (5) side arms were synthesized in good yields by N -alkylation of 4,13-diaza-18-crown-6. The point group of 18-crown-6 is S 6.

30.04.2021 Diaza-18-crown-6- ether

Purity: >98.0%(T). Synonyms: 1,4,10,13-Tetraoxa- 7,16-diazacyclooctadecane. Documents: SDS | Specifications | C of A & Other Synonym: 1,10-Diaza-18-crown-6 1,7-Diaza-12-crown-4 ≥97.0% 1,4,10,13- Tetraoxa-7,16-diazacyclooctadecane is a crown ether, which can be used: 1,10-Diaza-18-crown-6 are starting materials to produce macrocyclic polyamine metal-complexing agents. It is used as a ligand in Also used as an ether. Shop a large selection of Chemicals products and learn more about 4,13-Diaza- 18-crown 6-Ether 98.0+%, TCI America™ .

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Learn more about N,N'-Dibenzyl-4,13-diaza-18-crown 6-ether. We enable science by offering product choice, services, process excellence and our people make it happen. Diaza-18-crown-6 compounds of the formula I: ##STR1## wherein X is a phenol, naphthol or quinolinol moiety selected from those of the formulae: ##STR2## R 1 , R 2 , R 3 , R 4 and R 5 are independently selected from hydrogen, halo, cyano, nitro, (C 1 -C 6 ) alkyl, (C 2 -C 8 ) acyl, acetamido, mercapto, alkyl or arylsulfonyl, trifluoromethyl, aryl, and substituted aryl wherein the aryl moiety is Practical syntheses of versatile building blocks of crown ethers 1 and 2, chiral amine precursors 3–6 and chiral diaza 18-crown-6 ethers 7–12 are reported starting from chiral amines. Find 4,13-Diaza-18-crown 6-Ether at SpectrumChemical.com now.

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Great deals on chemicals and chemical supplies. N,N'-Dibenzyl-4,13-diaza-18-crown-6 (25.0 g, 56 mmol) (Note 11), 10% Pd/C catalyst (1.0 g), and absolute ethanol (300 mL) are shaken in a Parr series 3900 hydrogenation apparatus at 60-psi hydrogen pressure and 25°C for 72 hr. The mixture is filtered through a pad of Celite and concentrated under reduced pressure. Learn more about N,N'-Dibenzyl-4,13-diaza-18-crown 6-ether. We enable science by offering product choice, services, process excellence and our people make it happen. Aug 10, 2005 · Nucleophilic substitution in β-chlorovinyl phenyl ketone with diaza-18-crown-6 ether resulting in displacement of the chlorine atom afforded N,N’-bis(3-oxo-3-phenylpropen-1-yl)-1,10-diaza-18-crown-6 ether.

This fact was Poly(ethyleneoxy)amines, such as those having the structure: H.sub.2 N--(CH.sub.2).sub.a --(OCH.sub.2 CH.sub.2).sub.b --NH--(CH.sub.2 CH 2 O) c --(CH 2 ) d --R where a and d are independently 2 to 3; b and c are independently 1 to 4 and R is --OH or --NH 2 , may be reacted over a transition metal catalyst such as one containing nickel to produce diaza crown ethers, such as, for example 4,13 This is reliant on the spatial arrangement between the amine and its hydrogen bonds with the ether oxygens. 18-Crown-6-tetracarboxylic acid is the easiest to obtain commercially and has been used to resolve a number of primary amines and racemic amino acids on a silica capillary, by addition of the crown ether into the buffer phase at low concentration, under CZE conditions.

Great deals on chemicals and chemical supplies. Learn more about N,N'-Dibenzyl-4,13-diaza-18-crown 6-ether. We enable science by offering product choice, services, process excellence and our people make it happen. 8/10/2005 A rhodamine B-based sensor consisting of two rhodamine B moieties linked to the two amine sides of a 4,13-diaza-18-crown-6 ether was synthesized as a highly sensitive fluorescent probe for monitoring Cr3+ in a MeOH–H2O (3 : 2, v/v, pH 7.2) solution and in living cells. Application of self organizing maps and GA-MLR for the estimation of stability constant of 18-crown-6 ether derivatives with sodium cation vol.79, pp .1-2, 2014 Diaza-18-crown-6 appended dual 7-hydroxyquinolines; mercury ion recognition in aqueous solution pp .21 4/1/2014 5/28/2020 Suppliers and manufactures - with identical CAS number as Crown ether/18-Crown-6 For the following products supplier are listed below: 1,4,7,10,13,16-Hexaoxacyclooctadecane 18-Crown 6-Ether 18-Crown-6 Diaza-18-crown-6 compounds of the formula I: wherein X is a phenol, naphthol or quinolinol moiety selected from those of the formulae: R1, R2, R3, R4 and R5 are independently selected from hydrogen, halo, cyano, nitro, (C1-C6) alkyl, (C2-C8) acyl, acetamido, mercapto, alkyl or arylsulfonyl, trifluoromethyl, aryl, and substituted aryl wherein the aryl moiety … Ten new 8-hydroxyquinoline-containing diaza-18-crown-6 ligands and analogues were synthesized via a one-pot or stepwise Mannich reaction, reductive amination, or by reacting diaza-18-crown-6 with 5,7-dichloro-2-iodomethyl-8-quinolinol in the presence of N,N-diisopropylethylamine. The Mannich reactio … We have previously shown antitumour activity of a number of 18-crown-6 ether compounds that transport potassium ions across membranes.

EC Number 245-965-0. MDL number MFCD00005112. PubChem Substance ID 24857813. NACRES NA.22 N,N'-Dibenzyl-4,13-diaza-18-crown-6 (25.0 g, 56 mmol) (Note 11), 10% Pd/C catalyst (1.0 g), and absolute ethanol (300 mL) are shaken in a Parr series 3900 hydrogenation apparatus at 60-psi hydrogen pressure and 25°C for 72 hr. The mixture is filtered through a pad of Celite and concentrated under reduced pressure.

Jun 20, 2003 · Application of diaza-18-crown-6-capped beta-cyclodextrin bonded silica particles as chiral stationary phases for ultrahigh pressure capillary liquid chromatography. Gong Y(1), Xiang Y, Yue B, Xue G, Bradshaw JS, Lee HK, Lee ML. Apr 05, 2008 · This page was last edited on 13 October 2020, at 03:28. Files are available under licenses specified on their description page. All structured data from the file and property namespaces is available under the Creative Commons CC0 License; all unstructured text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. Suppliers and manufactures - with identical CAS number as Crown ether/18-Crown-6 For the following products supplier are listed below: 1,4,7,10,13,16-Hexaoxacyclooctadecane 18-Crown 6-Ether 18-Crown-6 N,N'-bis(bromobenzyl) and N,N'-bis(halopyridinyl) derivatives of diaza-12-crown-4, diaza-15-crown-5 and diaza-18-crown-6 ethers were synthesized in high yields. The Pd-catalyzed macrocyclization reactions of these compounds were carried out using a variety of polyamines and oxadiamines were carried out to give novel macrobicyclic and macrotricyclic compounds of the cryptand type.

Beilstein/REAXYS Number 609764 . EC Number 245-965-0. MDL number MFCD00005112. PubChem Substance ID 24857813. NACRES NA.22 N,N'-Dibenzyl-4,13-diaza-18-crown-6 (25.0 g, 56 mmol) (Note 11), 10% Pd/C catalyst (1.0 g), and absolute ethanol (300 mL) are shaken in a Parr series 3900 hydrogenation apparatus at 60-psi hydrogen pressure and 25°C for 72 hr. The mixture is filtered through a pad of Celite and concentrated under reduced pressure. Due to high demand for SPECTRUM 4, 13-Diaza-18-Crown 6-Ether, 5g, availability is subject to change without notice.

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In chemistry, an aza-crown ether is an aza analogue of a crown ether (cyclic polyether). While the parent crown ethers have the formulae (CH2CH2O)n, the parent

Sep 17, 2010 · N,N'-bis-((8-hydroxy-7-quinolinyl)methyl)-1,10-diaza-18-crown-6 ether 1a and its analogue 1c are known as fluorescent sensors of magnesium in living cells. With the comparison (Table V-1) of several bibracchial lariat ethers based on the 4,13-diaza-18-crown-6 system (Figure V-3). The binding constants for the potassium and sodium ions do not differ by much for each host due to enthalpy-entropy compensation. The enthalpy term is more negative for each complex for the potassium cation indicating a less monoaza- and diaza-18-crown-6 ethers were studied the logP of the molecule is the most important molecular descriptor, among ~1300 tested descriptors, in determining biological potency (R2 cv =0.704) to validate this QSAR model six novel highly lypophilic diaza-18-crown-6 derivatives Adamantane aza-crown ethers were obtained by reaction of the corresponding adamantane derived tosylates or adamantane acid chlorides with mono- and diaza-18-crown-6. The prepared compounds showed moderate (monoaza-18-crown-6) to strong (diaza-18-crown-6) antiproliferative and cytotoxic activity on several tumor cell lines, revealing their Get Crown Ethers at Spectrum Chemical. SpectrumChemical.com carries a full line of fine chemicals, lab appliances and lab supplies.

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In the ethers obtained, the carbonyl O atoms act as additional electron-donating sites. Complexation of lariat ethers II and III with metal cations in solution was studied by 1H NMR spectroscopy (acetone-d6, methanol-d4). The stability constants of the N,N'-Dibenzyl-4,13-diaza-18-crown 6-Ether. text.skipToContent text.skipToNavigation. TCI uses cookies to personalize and improve your user experience. By continuing 1,10-Diaza-18-crown-6 are starting materials to produce macrocyclic polyamine metal-complexing agents. It is used as a ligand in chemistry for the applications of diagnostic imaging technique to identify medical condition or disease and for the development of medication as a therapeutic agent and pharmaceutic aid.

A stand-alone 18-crown-6 ether with an embedded potassium ion (a) and its graphene- embedded analog (b).