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108-26-9 - 3-Methyl-2-pyrazolin-5-one, 98+% - 2,4-Dihydro-5-methyl-3H-pyrazol-3-one - A10253 - Alfa Aesar

A10253 3-Methyl-2-pyrazolin-5-one, 98+%

Codice CAS
108-26-9
Sinonimi
2,4-Dihydro-5-methyl-3H-pyrazol-3-one

Dimensioni Prezzo ($) Quantità Disponibilità
10g 34,30
50g 126,69
250g 341,60
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3-Methyl-2-pyrazolin-5-one, 98+%

MDL
MFCD00020699
EINECS
203-565-3

Proprietà chimiche

Formula
C4H6N2O
Peso formula
98.11
Punto di fusione
220-224°
Solubilità
Slightly soluble in ethanol.

Applicazioni

3-Methyl-2-pyrazolin-5-one is used in the preparation of spirocyclic [indole-3,4'-pyrano[2,3-c]pyrazole] by reacting with isatins and malonitrile in the presence of sodium bromide as electrolyte.

Note

Incompatible with oxidizing agents.

Letteratura

Vereshchagin, A. N.; Elinson, M. N.; Dorofeeva, E. O.; Nasybullin, R. F.; Bushmarinov, I. S.; Goloveshkin, A. S.; Egorov, M. P. Electrocatalytic cyclization of 3-(5-hydroxy-3-methylpyrazol-4-yl)-3-arylpropionitriles: ‘one-pot’ simple fast and efficient way to substituted spirocyclopropylpyrazolones. Electrochim. Acta 2015, 165, 116-121.

Wang, H. X.; Wu, L. L.; Wang, Y. M.; Zhou, Z. H. Organocatalyzed asymmetric tandem Michael-cyclization reaction of 4-benzylidene-3-methylpyrazol-5-ones and malononitrile: stereocontrolled construction of pyrano[2,3-c]pyrazole scaffold. RSC Adv. 2015, 5 (53), 42836-42842.

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

Codice tariffe armonizzato
2933.19
TSCA
Yes
RTECS
UQ9451500

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