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103-71-9 - Phenyl isocyanate, 98+% - A12808 - Alfa Aesar

A12808 Phenyl isocyanate, 98+%

Codice CAS
103-71-9
Sinonimi

Dimensioni Prezzo ($) Quantità Disponibilità
5g 16,20
100g 89,40
250g 179,00
1000g 503,00
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Phenyl isocyanate, 98+%

MDL
MFCD00001994
EINECS
203-137-6

Proprietà chimiche

Formula
C7H5NO
Peso formula
119.12
Punto di fusione
-33°
Punto di ebollizione
62-64°/11mm
Punto di infiammabilità
51°(123°F)
Densità
1.094
Indice di rifrazione
1.5360
Sensibilità
Moisture Sensitive
Solubilità
Miscible with ether.

Applicazioni

Phenyl isocyanate is used with triethylamine in order to activate nitro groups to undergo 1,3-dipolar cycloaddition. It is also employed in the preparation of chemically modified cellulose paper. Further, it is used in the preparation of functionalized graphene oxide nanoplatelets. In addition to this, it reacts with ethyl alcohol to prepare ethyl alfa,gamma-diphenylallophanate and small amount of phenyl isocyanate dimer.

Note

Store in a cool place. Incompatible with strong oxidizing agents, water, moisture, alcohols, amines, strong bases and strong acids.

Letteratura

For general reactions of isocyanates, see Appendix 3.

Can be used, in the presence of pyridine, to protect alcohols as N-phenylcarbamates: J. Am. Chem. Soc., 94, 3578 (1972), e.g. selective protection of primary OH groups in pyranosides; cleavage by reduction with LiAlH4: Tetrahedron Lett., 28, 4165 (1987). The group can also be cleaved by refluxing with NaOMe: Acta Chem. Scand., 15, 87, 96 (1961). Amines may also be protected as N-phenylcarbamates: Tetrahedron Lett., 1935 (1977).

Forms ureas by reaction with amines; e.g. Tris(2-aminoethyl)­amine, B21789, gives a molecule containing three urea groups which was used in studies of spacers for phosphate receptors: Chem. Lett., 759 (1995). Reaction with 4-aminobenzimidazole derivatives has been used in the synthesis of 1-phenylxanthine derivatives: Synthesis, 855 (1995).

In the presence of triethylamine, dehydrates nitroalkanes to nitrile oxides, which can undergo 1,3-dipolar cycloadditions: J. Am. Chem. Soc., 82, 5339 (1960); Synthesis, 757 (1980). Similarly, aldoximes are converted to nitriles: J. Org. Chem., 26, 782 (1961).

Conversion to diphenylcarbodiimide can be catalyzed by 3-Methyl-1-phenyl-2-phospholene 1-oxide, A11792: Org. Synth. Coll., 5, 501 (1973).

Seifi, M.; Ebrahimipour, S. Y.; Simpson, J.; Dusek, M.; Eigner, V.; Sheibani, H. Combination of Pyridinium and Isoquinolinium Ylides with Phenylisocyanate and Isothiocyanates: Synthesis, Characterisation, and X-Ray Crystal Structures of Mesoionic Monosubstituted 3-Oxo-Propanamides or Thioamides. Aust. J. Chem. 2015, 68 (10), 1577-1582.

Mali'n, T. J.; Lindberg, S.; Astot, C. Novel glutathione conjugates of phenyl isocyanate identified by ultra-performance liquid chromatography/electrospray ionization mass spectrometry and nuclear magnetic resonance. J. Mass Spectrom. 2014, 49 (1), 68-79.

Rischio GHS e dichiarazioni precauzionali

Dichiarazioni di rischio (UE): H226-H302-H330-H314-H318-H334-H317

Flammable liquid and vapour. Harmful if swallowed. Fatal if inhaled. Causes severe skin burns and eye damage. Causes serious eye damage. May cause allergy or asthma symptoms or breathing difficulties if inhaled. May cause an allergic skin reaction.

Dichiarazioni precauzionali: P303+P361+P353-P304+P340-P305+P351+P338-P320-P405-P501a

IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Specific treatment is urgent (see label). Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Altri riferimenti

Merck
14,7296
Beilstein
471391
Classe di rischio
6.1
Gruppo di imballaggio
I
Codice tariffe armonizzato
2929.10
TSCA
Yes
RTECS
DA3675000

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