2-テノイル酸 化學(xué)特性,用途語,生産方法
外観
白色～うすい褐色, 結(jié)晶性粉末～粉末又は塊
溶解性
水、エタノール及びアセトンに溶ける。
用途
有機(jī)合成用原料。
効能
去痰薬
化學(xué)的特性
The substance is a light yellow crystal powder. It dissolves in hot water, ethanol, and ether, and is only slightly soluble in chloroform.
使用
2-Thenoic Acid, is a sulfur-containing heterocyclic compound, used in the synthesis of pharmaceutical and biologically active compounds. It is also shown to be utilized by presumptive Rhodococcus bacterium in soil, as a sole source of carbon.
調(diào)製方法
Thiophene 2-Carboxylic Acid, T2CA, is prepared via oxidation of 2-acetylthiophene using hypochlorite, because oxidation of alkylthiophenes leads to general breakdown of the thiophene ring.
定義
ChEBI: Thiophene-2-carboxylic acid is a thiophenecarboxylic acid in which the carboxy group is located at position 2. It is a conjugate acid of a thiophene-2-carboxylate.
主な応用
The sodium salt of 2-Thiophenecarboxylic acid(T2CA) is used to treat influenza (trophires). Other salts, e.g., the Li salt, have minor medicinal uses and the free acid is a mucolytic. A US Patent describes the use of the Na salt as a lubricating oil thickener.
Suprofen, a nonsteroidal anti-inflammatory (NSAI), and tienilic acid (ticrynafen), a potent diuretic, were both very large prospective markets for T2CA or its acid chloride, but were almost completely withdrawn in the 1980s. Sanofi Aventis'NSAI tiaprofenic acid was comparatively successful in this market, but although it is still marketed it has subsequently been superceded by alternative products.
The 5-nitro derivative of T2CA is used to produce nifurzide, an intestinal antibacterial.
Pfizer's anti-inflammatory tenidap is a developing drug which uses the acid chloride of T2CA as the starting intermediate.
純化方法
Crystallise the acid from water and dry it in a vacuum. The amide has m 181o(from H2O) and pK2 5 10.54(50% aqueous dioxane). [Beilstein 18 H 289, 18 I 438, 18 II 269, 18 III/IV 4011, 18/6 V 158.]
2-テノイル酸 上流と下流の製品情報
原材料
準(zhǔn)備製品