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

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

Codice CAS
14187-32-7
Sinonimi

Dimensioni Prezzo ($) Quantità Disponibilità
5g 21,22
25g 69,73
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Dibenzo-18-crown-6, 98+%

MDL
MFCD00005098
EINECS
238-041-3

Proprietà chimiche

Formula
C20H24O6
Peso formula
360.41
Punto di fusione
160-164°
Punto di ebollizione
380-384°/679mm
Solubilità
Sparingly soluble in water.

Applicazioni

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.

Note

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.

Letteratura

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.

Rischio GHS e dichiarazioni precauzionali

Dichiarazioni di rischio (UE): H315-H319-H335

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

Dichiarazioni precauzionali: P261-P280-P305+P351+P338-P304+P340-P362-P312-P321-P405-P403+P233-P501a

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/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. Take off contaminated clothing and wash before reuse. Call a POISON CENTER or doctor/physician if you feel unwell. Specific treatment (see label). Store locked up. Store in a well-ventilated place. Keep container tightly closed. Dispose of contents/container in accordance with local/regional/national/international regulations.

Altri riferimenti

Merck
14,2602
Beilstein
1162153
Codice tariffe armonizzato
2932.99
TSCA
Yes
RTECS
HP5386000

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