シアノ酢酸 化学特性,用途語,生産方法
外観
白色～ほとんど白色, 結晶
溶解性
水及びエタノールに溶ける。
用途
有機合成原料。
用途
中間体の合成、バルビタールの製造
説明
Cyanoacetic acid is an organic compound. It is a white, hygroscopic solid. The compound contains two functional groups, a nitrile (C≡N) and a carboxylic acid. It is a precursor to cyanoacrylates, components of adhesives.
Cyanoacetic acid is used in pharmaceutical industry for producing vitamin B6 and caffeine. It is also used in making dyes, agricultural chemicals, and in the synthesis of phenylacetic acid esters. It acts as a precursor cyanoacrylates viz. ethyl cyanoacrylate.
化学的特性
white to light beige adhering crystalline solid
使用
Cyanoacetic acid was used in the synthesis of N-piperidine-cyanacetamide and N-morpholyl-cyanacetamide. It was also used in the preparation of a panchromatic dye for dye-sensitized solar cells.
定義
ChEBI: A monocarboxylic acid that consists of acetic acid bearing a cyano substituent.
主な応用
Cyanoacetic acid can be used as a reagent:
Along with acetic anhydride for cyanoacetylation of various pyrroles, indoles, and aniline derivatives. It can also be used in other reactions such as cyclizations, syntheses of coumarins and other heterocycles.
To prepare of key intermediate via Knoevenagel condensation in the total synthesis of 5-acetamido-substituted melatonin derivatives as MT3 receptor ligands.
In the synthesis of aminopyrrolinone derivatives by reacting Ugi adducts of cyanoacetic acid and aromatic aldehydes.
製造方法
Cyanoacetic acid is prepared by treatment of chloroacetate salts with sodium cyanide followed by acidification. Electrosynthesis by cathodic reduction of carbon dioxide and anodic oxidation of acetonitrile also affords cyanoacetic acid.
一般的な説明
Yellow-brown liquid with an unpleasant odor. Sinks and mixes with water.
空気と水の反応
Water soluble.
反応プロフィール
White, moderately toxic solid, combustible. When heated to decomposition Cyanoacetic acid emits toxic fumes of nitrile and oxides of nitrogen. A stirred mixture with furfuryl alcohol exploded violently upon heating [MCA Case History No 858].
健康ハザード
Contact irritates eyes and may irritate skin.
火災危険
Special Hazards of Combustion Products: Toxic oxides of nitrogen and toxic and flammable acetonitrile vapors may form in fire.
純化方法
Recrystallise the acid to constant melting point from *benzene/acetone (2:3), and dry it over silica gel. [Beilstein 2 H 583, 2 I 253, 2 II 530, 2 III 1626, 2 IV 1888.]
シアノ酢酸 上流と下流の製品情報
原材料
準備製品