4-クロマノン

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

  H303：飲み込むと有害のおそれ

• 注意書き

  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+P312：飲み込んだ場合：気分が悪い時は医師に連絡する こと。

  P403：換気の良い場所で保管すること。

4-クロマノン 価格

MSDS Information

• 4-Chromanone

4-クロマノン 化学特性,用途語,生産方法

• 外観

  白色～微褐黄色の結晶または液体

• 用途

  有機合成原料。

• 化学的特性

  white to light yellow crystal powder

• 使用

  4-Chromanone has been used to study the substrate specificity and catalytic ability of 4-hydroxyacetophenone monooxygenase isolated from Pseudomonas fluorescens ACB

• 純化方法

  It has been recrystallised from pet ether, or purified by dissolving in *C6H6 washing with H2O, drying (MgSO4), evaporating and distilling in a vacuum, then recrystallising the residue. The liquid has a pleasant lemon-like odour. The semicarbazone has m 227o. [Loudon & Razdan J Chem Soc 4299 1954.] The oxime is prepared from 3g of chromanone, 3g NH2OH.HCl in EtOH (50mL), 6g K2CO3 and refluxed on a water bath for 6hours. The solution is poured into H2O, the solid is filtered off, dried and dissolved in hot *C6H6 which on addition of pet ether yields the oxime as glistening needles m 140o. Hydrolysis of this gives very pure chromanone. The benzal derivative is prepared from 3g of chromanone and 4g PhCHO in 50mL EtOH, heated to boiling, 10mL of conc HCl are added dropwise and set aside for several days. The derivative separates and is recrystallised from EtOH to give yellow needles, m 112o [Powell J Am Chem Soc 45 2711 1923]. Reaction with Pb(OAc)4 yields the 3-acetoxy derivative m 74o (from pet ether + trace of EtOAc) [Cavill et al. J Chem Soc 4573 1954, Beilstein 17/10V 14].

4-クロマノン 上流と下流の製品情報

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4-クロマノン スペクトルデータ(¹HNMR、¹³CNMR、IR1、MS、Raman)

491-37-2, 4-クロマノン キーワード