274984
18-Crown-6
≥99.0%
Sinónimos:
1,4,7,10,13,16-Hexaoxacyclooctadecane
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About This Item
Fórmula empírica (notación de Hill):
C12H24O6
Número de CAS:
Peso molecular:
264.32
Beilstein/REAXYS Number:
1619616
EC Number:
MDL number:
UNSPSC Code:
12352005
PubChem Substance ID:
NACRES:
NA.22
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assay
≥99.0%
form
solid
mp
42-45 °C (lit.)
functional group
ether
SMILES string
O1CCOCCOCCOCCOCCOCC1
InChI
1S/C12H24O6/c1-2-14-5-6-16-9-10-18-12-11-17-8-7-15-4-3-13-1/h1-12H2
InChI key
XEZNGIUYQVAUSS-UHFFFAOYSA-N
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General description
18-Crown-6 is a macrocyclic polyether used to synthesize ionic liquid based crown-ether coordination compounds.
18-Crown-6 is the simplest crown ether that can be prepared by reacting triethylene glycol with triethylene glycol dichloride in the presence of potassium hydroxide as a base. 18-Crown-6 can solubilize metal salts, particularly potassium salts, in nonpolar and dipolar aprotic solvents. Thus, it is widely used as a phase transfer catalyst. It can also be used as a metal complexing agent to prepare a variety of molecular complexes.
18-Crown-6 is the simplest crown ether that can be prepared by reacting triethylene glycol with triethylene glycol dichloride in the presence of potassium hydroxide as a base. 18-Crown-6 can solubilize metal salts, particularly potassium salts, in nonpolar and dipolar aprotic solvents. Thus, it is widely used as a phase transfer catalyst. It can also be used as a metal complexing agent to prepare a variety of molecular complexes.
Application
18-Crown-6 can be used as a catalyst for:
- N-alkylation of heterocyclic compounds in the presence of tert-butoxide base.
- Allylation of aldehydes to corresponding homoallylic alcohols using potassium allyltrifluoroborate.
- Preparation of N-propargylpyrrole by the reaction of pyrrole with potassium hydroxide.
- Polymerization of methacrylic esters and hindered alkyl acrylates.
- Chemoselective reduction of fused tetrazoles with NaBH4 and potassium hydroxide.
18-Crown-6 can solubilize metal salts, particularly potassium salts, in nonpolar and dipolar aprotic solvents. Thus, it is widely used as a phase transfer catalyst. It can also be used as a metal complexing agent to prepare a variety of molecular complexes.
Puede ser útil como catalizador de transferencia de fase.
Other Notes
Poliéteres macrocíclicos con repetición de unidades (-CH2CH2O). Los compuestos son ionofóricos (forman compuestos estables con cationes).
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Referencia del producto
Descripción
Precios
signalword
Warning
hcodes
Hazard Classifications
Acute Tox. 4 Oral
Storage Class
11 - Combustible Solids
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
dust mask type N95 (US), Eyeshields, Gloves
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Los clientes también vieron
Gokel, G.W.
Crown Ethers and Cryptands (1991)
18-Crown-6
Liotta, Charles, L and Berkner, Joachim
Encyclopedia of Reagents for Organic Synthesis, Second Edition (2001)
Improved synthesis and efficient chemoselective reduction of fused tetrazoles under phase-transfer conditions
Desai ND and Shah RD
Synthesis, 2006(19), 3275-3279 (2006)
Principles and synthetic applications in crown ether chemistry
Gokel, George W and Durst, H Dupont
Synthesis, 1976(03), 168-184 (1976)
Magnetic blocking at 10 K and a dipolar-mediated avalanche in salts of the bis (?8-cyclooctatetraenide) complex [Er (COT) 2]?.
Meihaus K R, et al.
Journal of the American Chemical Society, 135(47), 17952-17957 (2013)
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