| 摘要 |
PURPOSE:To obtain the titled compound in high yield, by reacting vinyl acetate with a halogen and an alcohol and neutralizing the resultant reaction liquid of halogenoacetaldehyde alkyl acetal at a low temperature with a hydroxide of a group IIa metal of the periodic table. CONSTITUTION:A reaction liquid containing a halogenoacetaldehyde dialkyl acetal produced from vinyl acetate, halogen and alcohol is treated by adding preferably 1.0-1.2mol (based on 1mol of vinyl acetate) of a hydroxide of a group IIa metal (especially calcium hydroxide, magnesium hydroxide, etc.) while maintaining the system at <=20 deg.C. EFFECT:The treatment can be carried out absolutely without using a compound requiring prudent care in handling and operation and the efficiency of treatment can be maintained even by lowering the treatment temperature. USE:An intermediate for pharmaceuticals, agricultural chemicals, etc. An intermediate raw material for reducing agent or modifying agent of water-soluble polymer.
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