5684-29-7Relevant articles and documents
Fungicidal oxathiin azoles
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, (2008/06/13)
This invention relates to a novel class of azoles of 5,6-dihydro-1,4-oxathins having fungicidal activity. The class of compounds is represented by formula (I) STR1 wherein R is each independently halogen; trifluoromethyl; C1 -C8 alkyl; C3 -C6 cycloalkyl; C1 -C8 alkoxy; C1 -C8 alkoxycarbonyl; amino; substituted amino; aminocarbonyl; aminosulfonyl; C1 -C8 alkoxy sulfonyl; phenyl; phenoxy; phenyl or phenoxy mono-, di- or tri-substituted independently with halogen, trifluoromethyl, C1 -C8 alkyl or C1 -C8 alkoxy; or benzyl; G is CH or N; m is 0 1 or 2; and n is 0, 1 or 2. Fungicidal compositions, methods of controlling fungi and methods for preparing the compounds are within the scope of the invention.
1,2-Oxathiolan, a Simple Sultene
Davis, Anthony P.,Whitham, Gordon H.
, p. 741 - 742 (2007/10/02)
Evidence is presented which indicates that pyrolysis of N-(3-hydroxypropylthio)phthalimide gives 1,2-oxathiolan as a volatile product via an intermediate tentatively identified as a cyclic oligomer.
Method of making 5,6-dihydro-2-methyl-N-phenyl-1,4-oxathiin-3-carboxamide
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, (2008/06/13)
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 quaternary ammonium salt 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.