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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%

Numéro CAS
5222-73-1
Synonymes
Dimethyl squarate
Squaric acid dimethyl ester

Dimensions Prix ($) Quantité Disponibilité
1g 43,92
5g 146,85
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3,4-Dimethoxy-3-cyclobutene-1,2-dione, 98%

MDL
MFCD00101316

Propriétés chimiques

Formule
C6H6O4
Poids formulaire
142.10
Point de fusion
53-56°
Solubilité
Very soluble in water.

Applications

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.

Notes

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

Références bibliographiques

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.

Mentions de danger et de prudence du SGH

Mentions de danger (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.

Mentions de prudence: 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.

Autres références

Code tarifaire harmonisé
2914.50
TSCA
No

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