ジメチルクロロアセタール

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Warning

• 危険有害性情報

  H226：引火性の液体および蒸気

  H302：飲み込むと有害

  H412：長期的影響により水生生物に有害

• 注意書き

  P210：熱/火花/裸火/高温のもののような着火源から遠ざ けること。－禁煙。

  P273：環境への放出を避けること。

ジメチルクロロアセタール 価格

MSDS Information

• 2-Chloro-1,1-dimethoxyethane

ジメチルクロロアセタール 化学特性,用途語,生産方法

• 外観

  無色～ほとんど無色透明液体

• 化学的特性

  CLEAR COLORLESS TO YELLOWISH LIQUID

• 使用

  Chloroacetaldehyde dimethyl acetal can be used as a reactant to synthesize:
  
  • 2-(chloromethyl)-4,7-dethyl-1,3-dioxepane
  • 2-(chloromethyl)-5,6-benzo-1,3-dioxepane
  • ketene dimethyl acetal
  
  

• 製造方法

  Chloroacetaldehyde dimethyl acetal is obtained by the stoichiometric reaction of vinyl acetate and chlorine in the presence of excess methanol. The specific steps are as follows:
  186 ml (172 g = 2.0 mol) of vinyl acetate and 142 g (2.0 mol) of chlorine were simultaneously introduced into 324 ml of methanol with stirring and cooling at 0 ° to 2 ° within 1 hour. Then 50 ml of low boilers were distilled off over a 50 cm Vigreux column, then 19.8 g of an intermediate run of a batch which had been carried out in the same way were added, and finally 34 g of calcium oxide were added with stirring and cooling at 40 ° -50 ° C. within 30 minutes. After neutralization was complete, the reaction mixture was in the form of two separate liquid phases. After the layers had been separated off, the upper layer obtained was fractionated, 88 g of the forerunner, which mainly comprised methyl acetate and methanol, 19.8 g of the intermediate run, which mainly contained methanol, chloroacetaldehyde, chloroacetaldehyde mono and dimethylacetal, and the main fraction was 223.1 g of chloroacetaldehyde dimethylacetal ds 89.5% d. Th. Were obtained. If the lower layer formed after the calcium oxide addition is shaken twice with 100 ml of methyl acetate each time and the combined organic phases are distilled, 92.1% of theory. Th. Chloroacetaldehyde dimethyl acetal obtained.

• 一般的な説明

  Chloroacetaldehyde dimethyl acetal is a clear, colorless liquid. It reacts with hydroxythiol to form hydroxy acetal.

• 純化方法

  Purify the acetal by fractional distillation. [Melhotra J Indian Chem Soc 36 4405 1959, Beilstein 1 IV 3134.]

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ジメチルクロロアセタール スペクトルデータ(¹HNMR、¹³CNMR、IR1、MS、Raman)

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