反应详情

A process for preparing 2-methyl-2-(methylsulfonyl) propionaldehyde 0-(methylcarbamoyl) oxime which comprises (i) reacting 2-methyl-2-(methylthio) propionaldehyde oxime with methyl isocyanate in the presence of an aqueous medium for a period sufficient to form 2-methyl-2-(methylthio) propionaldehyde O-(methylcarbamoyl) oxime and (ii) reacting 2-methyl-2-(methylthio) propionaldehyde 0-(methylcarbamoyl) oxime with a mixture of hydrogen peroxide and a carboxylic acid in the presence of a substantially aqueous medium and a catalytically effective amount of a mineral or organic sulfonic acid for a period sufficient to form 2-methyl-2-(methylsulfonyl) propionaldehyde 0-(methylcarbamoyl) oxime.