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5222-73-1 - 3,4-Dimethoxy-3-cyclobutene-1,2-dione, 98% - Dimethyl squarate - Squaric acid dimethyl ester - A18186 - Alfa Aesar

A18186 3,4-Dimethoxy-3-cyclobutene-1,2-dione, 98%

Codice CAS
5222-73-1
Sinonimi
Dimethyl squarate
Squaric acid dimethyl ester

Dimensioni Prezzo ($) Quantità Disponibilità
1g 43,92
5g 146,85
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3,4-Dimethoxy-3-cyclobutene-1,2-dione, 98%

MDL
MFCD00101316

Proprietà chimiche

Formula
C6H6O4
Peso formula
142.10
Punto di fusione
53-56°
Solubilità
Very soluble in water.

Applicazioni

3,4-Dimethoxy-3-cyclobutene-1,2-dione (Dimethyl squarate) finds it uses in the synthesis of chiral squaramides, highly enantioselective catalyst for the Friedel-Crafts reactions of indoles, 3-(hydroxyamino)-4-methoxy-3-cyclobutene-1,2-dione, squarate derivatives of the O-SP-core antigens, methyl squarate derivative of the Ogawa O-SP-core antigen, o-quinodimethanes, benzocyclobutenes, quinones. It is employed as a starting material in the preparation of o-quinodimethanes, benzocyclobutenes, and quinones.

Note

Store away from oxidizing agents. Keep the container tightly closed and place it in a cool, dry and well ventilated condition.

Letteratura

Yong Qian.; Gaoyuan Ma.; Aifeng Lv.; Hai-Liang Zhu.; Jing Zhao.; Viresh H Rawal. Squaramide-catalyzed enantioselective Friedel-Crafts reaction of indoles with imines.Chem Commun (Camb).2010,46(17), 3004-3006.

M Burak Onaran.; Anthony B Comeau.; Christopher T Seto. Squaric acid-based peptidic inhibitors of matrix metalloprotease-1.J Org Chem.2005,70(26), 10792-10802.

Rischio GHS e dichiarazioni precauzionali

Dichiarazioni di rischio (UE): H334-H315-H319-H317-H335

May cause allergy or asthma symptoms or breathing difficulties if inhaled. Causes skin irritation. Causes serious eye irritation. May cause an allergic skin reaction. May cause respiratory irritation.

Dichiarazioni precauzionali: P285-P261-P280-P305+P351+P338-P304+P340-P342+P311-P362-P312-P405-P501a

In case of inadequate ventilation wear respiratory protection. 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. If experiencing respiratory symptoms: Call a POISON CENTER or doctor/physician. Take off contaminated clothing and wash before reuse. Call a POISON CENTER or doctor/physician if you feel unwell. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Altri riferimenti

Codice tariffe armonizzato
2914.50
TSCA
No

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