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15988-11-1 - 4-Phenylurazole, 98+% - 4-Phenyl-1,2,4-triazolidine-3,5-dione - L00255 - Alfa Aesar

L00255 4-Phenylurazole, 98+%

Codice CAS
15988-11-1
Sinonimi
4-Phenyl-1,2,4-triazolidine-3,5-dione

Dimensioni Prezzo ($) Quantità Disponibilità
5g 25,30
25g 84,00
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4-Phenylurazole, 98+%

MDL
MFCD00005226
EINECS
240-127-0

Proprietà chimiche

Formula
C8H7N3O2
Peso formula
177.16
Punto di fusione
206-210°

Letteratura

Oxidation gives the aza-dienophile 4-phenyl-1,2,4-triazolinedione which is more reactive in cycloaddition reactions than tetracyanoethylene: J. Chem. Soc. (C), 1905 (1967); Angew. Chem. Int. Ed., 11, 715 (1972); Org. Prep. Proced. Int., 7, 251 (1975). Suitable oxidants include t-butyl hypochlorite: Org. Synth. Coll., 6, 936 (1988), or lead(IV) acetate: J. Org. Chem., 32, 330 (1967). For a further example, see Propargyl­triphenyl­phosphonium bromide, A12753.

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The adducts can be cleaved to the hydrazo-compounds by hydrazine hydrate. Cu(II) oxidation provides a route to azoalkanes: Synthesis, 543 (1981).

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Reacts with enolizable ketones in the presence of TFA to give ɑ-urazyl ketones: J. Org. Chem., 55, 193 (1990), which may be oxidized to ɑ-diketones with t-butyl hypochlorite: J. Org. Chem., 55, 197 (1990):

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ß-Diketones form adducts without an added catalyst. These yield 1,2,3-triketones on cleavage.

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Review of use of azodicarbonyl compounds in synthesis: Adv. Het. Chem., 30, 1 (1982).

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1,2,4-Triazolinediones form charge-transfer complexes with electron-rich aromatics, such as di- or trimethoxybenzenes: J. Org. Chem., 48, 1708 (1983).

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Rischio GHS e dichiarazioni precauzionali

Dichiarazioni precauzionali: P260-P201-P280-P304+P340-P405-P501a

Do not breathe dust/fume/gas/mist/vapours/spray. Obtain special instructions before use. Wear protective gloves/protective clothing/eye protection/face protection. 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.

Altri riferimenti

Beilstein
163361
Codice tariffe armonizzato
2933.99
TSCA
Yes

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