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26386-88-9 - Diphenylphosphonic azide, 97% - Diphenylphosphorazidate - Diphenylphosphoryl azide - A12124 - Alfa Aesar

A12124 Diphenylphosphonic azide, 97%

Codice CAS
26386-88-9
Sinonimi
Diphenylphosphorazidate
Diphenylphosphoryl azide

Dimensioni Prezzo ($) Quantità Disponibilità
5g 20,27
25g 65,39
100g 184,95
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Diphenylphosphonic azide, 97%

MDL
MFCD00001987
EINECS
247-644-0

Proprietà chimiche

Formula
C12H10N3O3P
Peso formula
275.20
Punto di ebollizione
161-162°/0.5mm
Punto di infiammabilità
>110°(230°F)
Densità
1.275
Indice di rifrazione
1.5520
Solubilità
Immiscible with water.

Applicazioni

Diphenylphosphonic azide acts as a reagent for the synthesis of peptides and phosphoramidates by reacting with amines. It is also used in the preparation of oligosaccharides linked with carbamate and urea bonds utilizing modified Curtis rearrangement. It is involved in pseudohalogen replacement of the azido group by treatment with nucleophilic reagents, such as water, butanol, ammonia, and various amines. Further, it is used as a hydroazidation catalyst for preparation of organoazides.

Note

Store in a cool place. Incompatible with acids and oxidizing agents.

Letteratura

Stable azide-transfer agent.

In the presence of an amine, carboxylic acids are converted to acyl azides which undergo a modified Curtius reaction in the presence of an alcohol to give alkyl carbamates directly. With t-butanol, the resulting t-butyl carbamates can readily be converted to the free amines with mild acid. Malonic half-esters, e.g. Ethyl­ hydrogen malonate, A12627 , give ɑ-amino acid derivatives: J. Am. Chem. Soc., 94, 6203 (1972); Chem. Pharm. Bull., 22, 1398 (1974); J. Org. Chem., 49, 185 (1984):

Use of the hindered base 1,8-Bis(dimethyl­amino)­naphthalene, L00313 , enables the isocyanate intermediates to be isolated: Synth. Commun., 23, 335 (1993). Application to ɑß-unsaturated acids provides a useful degradation to aldehydes with one C atom fewer by hydrolysis of the intermediate enamine. See, e.g.: Synth. Commun., 20, 589 (1990).

N-protected amino acids are converted to acyl azides for use in a low racemization peptide coupling technique: J. Am. Chem. Soc., 94, 6203 (1972); Synthesis, 549 (1974); J. Org. Chem., 44, 3101 (1979); 52, 764 (1987). See Appendix 6. The method is also applicable to the coupling of carboxylic acids with thiols: J. Org. Chem., 39, 3302 (1974); Chem. Pharm. Bull., 25, 2423 (1977). Similarly, macrocyclic lactams have been prepared without high dilution by reaction of diacids with diamines: Tetrahedron Lett., 31, 6469 (1990).

Under Mitsunobu conditions, converts alcohols directly to alkyl azides: Tetrahedron Lett., 1977 (1977). Alternatively, with 1,8-Diazabicyclo[5.4.0]undec-7-ene, A12449 , activated (e.g. benzylic) chiral alcohols have been converted to the azides with inversion in high ee: J. Org. Chem., 58, 5886 (1993); for illustrative example, see: Org. Synth., 75, 31 (1997).

Pyrrolidine enamines of cyclic ketones undergo 1,3-dipolar cycloaddition followed by rearrangement with loss of N2 to the ring contracted N-phosphoryl amidine which can be base hydrolyzed (high temperature) to the corresponding acid: Tetrahedron Lett., 4749 (1976); (cyclododecanone to cycloundecanecarboxylic acid): Org. Synth. Coll., 7, 135 (1990).

Li enolates unsubstituted at the ɑ-position can undergo diazo-transfer reactions to give the diazo carbonyl derivatives. With ɑ-alkyl amides, azide transfer occurs to give 3-amino-2H-azirines: Helv. Chim. Acta, 78, 1983 (1995). Enolates of ɑ-unsubstituted carboxamides, on treatment with the reagent, followed by di-t-butyl dicarbonate, give derivatives ɑ-amino acids: Helv. Chim. Acta, 79, 213 (1996):

Enables decarbonylation reactions of aldehydes to be carried out at ambient temperature with a catalytic amount of Chlorotris(triphenyl­phosphine)­rhodium(I)­, 10468 , by regeneration of the catalyst from an inactive Rh carbonyl complex: J. Org. Chem., 57, 5075 (1992).

Faigl, F.; Erdelyi, Z.; Nyerges, M.; Matravolgyi, B. Racemization-free synthesis of atropisomeric 1-phenylpyrrole based diamines using diphenylphosphoryl azide. Tetrahedron: Asymmetry 2015, 26 (14), 738-745.

Vothi, H.; Halm, S.; Nguyen, C.; Bae, I.; Kim, J. Thermal stabilities and flame retardancies of phloroglucinol-based organo phosphates when applied to polycarbonate. Fire Mater. 2014, 38 (1), 36-45.

Rischio GHS e dichiarazioni precauzionali

Dichiarazioni di rischio (UE): H301-H311-H331-H315-H319-H335

Toxic if swallowed. Toxic in contact with skin. Toxic if inhaled. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Dichiarazioni precauzionali: P261-P280-P301+P310-P305+P351+P338-P361-P304+P340-P311-P362-P405-P501a

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Remove/Take off immediately all contaminated clothing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Call a POISON CENTER or doctor/physician. Take off contaminated clothing and wash before reuse. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Altri riferimenti

Beilstein
2058967
Classe di rischio
6.1
Gruppo di imballaggio
III
Codice tariffe armonizzato
2928.00
TSCA
No

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