289-89-4

Basic information

• Product Name: 1,2-Oxathiin
• Synonyms: 1,2-Oxathiin
• CAS NO: 289-89-4
• Molecular Formula: C4H4OS
• Molecular Weight: 0
• Mol File: 289-89-4.mol
• Article Data: 2

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 1,2-Oxathiin(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2-Oxathiin(289-89-4)
• EPA Substance Registry System: 1,2-Oxathiin(289-89-4)

Safety Data

• Hazardous Substances Data: 289-89-4(Hazardous Substances Data)

Relevant articles and documents

Method of making 5,6-dihydro-2-methyl-N-phenyl-1,4-oxathiin-3-carboxamide

This method of making 5,6-dihydro-2-methyl-N-phenyl-1,4-oxathiin-3-carboxamide is based on the use of an oxathiolane, namely, 2-methyl-N-phenyl-1,3-oxathiolane-2-acetamide, which may be formed by condensing 2-mercaptoethanol with acetoacetanilide under acidic conditions in a solvent medium (aromatic hydrocarbon, chlorinated hydrocarbon or alkyl ester of an aliphatic acid). The said oxathiolane, with or without purification, is reacted with hydrogen peroxide in water or in a water-organic solvent mixture under basic conditions in the presence of a catalytic amount of a metal compound such as sodium tungstate to form 2-methyl-N-phenyl-1,3-oxathiolane-2-acetamide 3-oxide. The said oxathiolane oxide, while dissolved in a chlorinated hydrocarbon or an alkyl ester of an aliphatic carboxylic acid, or while suspended in an aromatic hydrocarbon, is subjected to a ring expansion reaction by heating under acidic conditions in the presence of a catalytic quantity of a sulfonium, sulfoxonium or phosphonium compound, to form 5,6-dihydro-2-methyl-N-phenyl-1,4-oxathiin-3-carboxamide with evolution of water. The product is a known bactericide and fungicide.