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14187-32-7 - Dibenzo-18-crown-6, 98+% - A13133 - Alfa Aesar

A13133 Dibenzo-18-crown-6, 98+%

Número CAS
14187-32-7
Nombre Alternativo

Tamaño Precio ($) Cantidad Disponibilidad
5g 21,00
25g 69,10
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Dibenzo-18-crown-6, 98+%

MDL
MFCD00005098
EINECS
238-041-3

Propiedades químicas

Fórmula
C20H24O6
Peso molecular
360.41
Punto de fusión
160-164°
Punto de ebullición
380-384°/679mm
Solubilidad
Sparingly soluble in water.

Aplicaciones

Dibenzo-18-crown-6, is used as an important raw material and intermediate used in organic Synthesis, pharmaceuticals, agrochemicals and dyestuff. It is an important organic intermediate.

Notas

Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Stable under recommended storage conditions. Incompatible to strong oxidizing agents, strong acids.

Referencias documentales

PD Beattie.; A Delay.; HH Girault. Investigation of the kinetics of assisted potassium ion transfer by dibenzo-18-crown-6 at the micro-ITIES by means of steady-state voltammetry. Journal of Electroanalytical Chemistry . 1995, 380 (1-2), 167-175.

IM Kolthoff.; MK Chantooni. Transfer activity coefficients in various solvents of several univalent cations complexed withdibenzo-18-crown-6. Jr - Analytical Chemistry. 1980, 380 (1-2), 167-175.

Comparison of the rates of displacement of F- in 1-fluoro-2- or 4-nitrobenzene with KOMe and KO-t-Bu in the presence of this crown ether gave a result (t-BuO- >> MeO-) opposite to the pattern observed in its absence: J. Chem. Soc., Perkin 2, 55 (1973).

Promotes the generation of bromochlorocarbene from Chlorodibromomethane, A16938: Syntheis, 783 (1977); Tetrahedron, 33, 363 (1977), and of dibromocarbene from Bromoform, A11904: Org. Synth., 75, 98 (1997).

In combination with Benzyl­triethyl­ammonium chloride, A13268, promotes the oxidative decarboxylation of arylacetic acids with NaIO4 to give high yields of the aryl aldehydes: Indian J. Chem. B, 35B, 151 (1996). Under the same conditions, phenacyl bromides are converted to benzoic acids.

Catalyst for the formation of phenacyl esters from phenacyl bromides and K salts of carboxylic acids in acetonitrile: Synth. Commun., 26, 1747 (1996).

Catalyst for the halogenative cleavage of epoxides with Br2 or I2, giving halohydrins in high yields: J. Org. Chem., 63, 1455 (1998).

See also 18-Crown-6, A11249 and Appendix 2.

Indicaciones de peligro y de precaución del GHS

Indicaciones de peligro (UE): H315-H319-H335

Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Indicaciones de precaución: P261-P280a-P305+P351+P338-P304+P340-P405-P501a

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Otras referencias

Merck
14,2602
Beilstein
1162153
Código de tarifa arancelaria unificado
2932.99
TSCA
Yes
RTECS
HP5386000

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