197719-33-8

Basic information

• Product Name: 5-methyl-4-ethoxycarbonyl-4-oxazolin-2-one
• CAS NO: 197719-33-8
• Molecular Weight: 171.153
• Mol File: 197719-33-8.mol
• Article Data: 4

Chemical Properties

• CAS DataBase Reference: 5-methyl-4-ethoxycarbonyl-4-oxazolin-2-one(CAS DataBase Reference)
• NIST Chemistry Reference: 5-methyl-4-ethoxycarbonyl-4-oxazolin-2-one(197719-33-8)
• EPA Substance Registry System: 5-methyl-4-ethoxycarbonyl-4-oxazolin-2-one(197719-33-8)

Safety Data

• Hazardous Substances Data: 197719-33-8(Hazardous Substances Data)

Upstream product

• 57332-84-0 3-bromo-2-oxo-butyric acid ethyl ester 
• 598-55-0 methyl carbamate 
• 188531-03-5 ethyl 3-[(p-nitrobenzenesulfonyl)oxy]-2-oxobutanoate 
• 5781-53-3 monomethyl oxalyl chloride 
• 84280-59-1 ethyl 4-methyl-5-oxo-2,5-dihydro-1,2-oxazole-3-carboxylate 
• 609-15-4 ethyl 2-chloro-3-oxo-butyrate 

Relevant articles and documents

Synthesis of 4-carboethoxy-4-oxazolin-2-ones from 3-nosyloxy-2-ketoesters

3-Nosyloxy-2-ketoesters, available from 2-ketoesters, react efficiently with methyl carbamate and tosic acid in refluxing toluene to provide 4-carboalkoxy-4-oxazolin-2-ones in good yields (41-84%).

Chemistry of 5-oxodihydroisoxazoles. Part 18. Synthesis of oxazoles by the photolysis and pyrolysis of 2-acyl-5-oxo-2,5-dihydroisoxazoles

N-Acylisoxazol-5-ones lose carbon dioxide under photochemical and thermal conditions affording iminocarbenes which undergo intramolecular cyclisation through the oxygen of the acyl group to give oxazoles. Under photochemical conditions those acylisoxazolones with electron withdrawing groups at C-4 usually give high yields of oxazoles, while those with electron donating groups at C-4 give only poor yields: the reverse is observed under thermal conditions.