93700-33-5

Basic information

• Product Name: 4H-1,3-Oxazin-4-one, 3-acetyl-2,3-dihydro-6-methyl-2-thioxo-
• CAS NO: 93700-33-5
• Molecular Formula: C7H7NO3S
• Molecular Weight: 185.203
• Mol File: 93700-33-5.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 4H-1,3-Oxazin-4-one, 3-acetyl-2,3-dihydro-6-methyl-2-thioxo-(CAS DataBase Reference)
• NIST Chemistry Reference: 4H-1,3-Oxazin-4-one, 3-acetyl-2,3-dihydro-6-methyl-2-thioxo-(93700-33-5)
• EPA Substance Registry System: 4H-1,3-Oxazin-4-one, 3-acetyl-2,3-dihydro-6-methyl-2-thioxo-(93700-33-5)

Safety Data

• Hazardous Substances Data: 93700-33-5(Hazardous Substances Data)

Upstream product

• 75-36-5 acetyl chloride 
• 2911-22-0 6-methyl-4-oxo-2-thioxo-3,4-dihydro-2H-1,3-oxazine 

Downstream Products

• 13250-46-9 acetyl isothiocyanate 

Relevant articles and documents

1,3-Oxazines and Related Compounds. IX. Alkylation, Acylation, and Cleavage Reaction of 6-Methyl-4-oxo-2-thioxo-3,4-dihydro-2H-1,3-oxazine

Alkylation of the title compound (2) with alkyl halides in the presence of Et3N proceeded exclusively on the sulfur atom to give the alkyl-1,3-oxazine derivatives.Acylation with acyl chlorides took place regioselectively on the nitrogen atom, giving the N-acyl derivatives. 1,3-Oxazine 2 was found to undergo cleavage of the ring into acetylketene and thiocyanic acid.Hence, treatment of 2 with alkyl halides in the presence of K2CO3 gave alkyl thiocyanates; treatment with active methylene compounds afforded γ-pyrone derivatives.N-Acyl derivatives of 2 also underwent thermal cleavage of the ring, leading to the corresponding acyl isothiocyanates.Keywords - 2-thioxo-4-oxo-1,3-oxazine; acetylketene; thiocyanic acid; acyl isothiocyanate; alkyl thiocyanate; acylation; alkylation; substituted γ-pyrone.