2,3-ジクロロ-5,6-ジシアノ-1,4-ベンゾキノン

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Danger

• 危険有害性情報

  H301：飲み込むと有毒

• 注意書き

  P264：取扱い後は皮膚をよく洗うこと。

  P264：取扱い後は手や顔をよく洗うこと。

  P270：この製品を使用する時に、飲食または喫煙をしないこ と。

  P301+P310：飲み込んだ場合：直ちに医師に連絡すること。

  P405：施錠して保管すること。

  P501：内容物/容器を．．．に廃棄すること。

2,3-ジクロロ-5,6-ジシアノ-1,4-ベンゾキノン 価格

MSDS Information

• DDQ

2,3-ジクロロ-5,6-ジシアノ-1,4-ベンゾキノン 化学特性,用途語,生産方法

• 外観

  黄色～くすんだ黄色～濃い紫色粉末～結晶

• 用途

  有機合成中に、酸化剤として使用，ステロイド化学でのアクリルアルコール類を酸化し、対応するα,β-不飽和ケトンの合成に使用，有機ELを構成するキャリア輸送層に使用。

• 説明

  2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) has a variety of applications. DDQ is a deprotection agent for ketals, acetals, and thioacetals. It is a useful electron transfer reagent for synthesis of quinolones and an oxidizing agent used to synthesize steroids. Additionally, DDQ is used with Ph3P to synthesize 1,2-benzisoxazoles.

• 化学的特性

  yellow to orange powder

• 使用

  An oxidizing agent, especially in steroid synthesis.
  2,3-Dichloro-5,6-dicyano-1,4-benzoquinone is used as a reagent for oxidative couplings and cyclization reactions and dehydrogenation of alcohols, phenols and steroid ketones. It is also used in the synthesis of 1,2-benzisoxazoles. It is a useful electron-transfer reagent for synthesis of quinolines from imines and alkynes or alkenes.

• 主な応用

  2,3-Dichloro-5,6-dicyano-p-benzoquinone (DDQ) can be used as:
  A deprotecting reagent for a variety of compounds, such as thioacetals, acetals, and ketals.
  An electron-transfer reagent for the synthesis of quinolines from imines and alkynes or alkenes.
  An effective reagent for the benzylic and allylic C?H functionalization.
  An oxidizing agent for the synthesis of functionalized furans and benzofurans.
  A reagent with Ph3P in an efficient synthesis of 1,2-benzisoxazoles.

• 製造方法

  The first synthesis of 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) was described by J.Thiele and F.Guntber in 1906. However, no interest was shown in the compound until Linstead and co-workers discovered its extraordinary potency as a dehydrogenating agent. Its oxidation potential is greater than that of any other known quinone.
  2,3-Dichloro-5,6-Dicyanobenzoquinone (DDQ). A New Preparation

• 作用機序

  2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) has many applications in the oxidation of various organic compounds such as ketones, alcohols, phenols, aromatic compounds, heterocyclic structures, etc. Apart from that, the presence of two chlorine atoms and two nitrile groups on the benzoquinone ring may also behave as a potential chlorinating agent. Consequently, DDQ could act simultaneously as the chlorinating agent and the oxidant. It can also remove the protective functional groups during deprotections of different chemical entities. For dehydrogenation by DDQ, the mechanism includes the transfer of hydride to the quinone oxygen followed by the transfer of a proton to the phenolate ion[1].

• 安全性

  DDQ reacts with water to release highly toxic hydrogen cyanide (HCN). A low-temperature and weakly acidic environment increases the stability of DDQ.

• 純化方法

  Crystallise DDQ from CHCl3, CHCl3/*benzene (4:1), or *benzene and store it at 0o. [Pataki & Harvey J Org Chem 52 2226 1987, Beilstein 10 H 902, 10 II 635, 10 IV 3521.]

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