New Approach to 3‐Aminothiophene‐ 2‐carboxylic Acid Derivatives: Access to 5‐Aryl‐4‐(ethylsulfanyl) Compounds
作者:Frédéric Lassagne、Francis Pochat、Sourisak Sinbandhit
DOI:10.1080/00397910701198922
日期:2007.4.1
Treatment of DMSO/water solutions of β‐bromo‐α‐(ethylsulfanyl)cinnamonitriles with sodium sulphide and α‐halo acetic acids derivatives followed by cyclization in a potassium carbonate/acetone/DMSO mixture gave the expected 3‐amino‐5‐aryl‐4‐(ethylsulfanyl)thiophene‐2‐carboxylic acids derivatives in fair yields.
摘要 用硫化钠和 α-卤代乙酸衍生物处理 DMSO/β-溴-α-(乙基硫基)肉桂腈的水溶液,然后在碳酸钾/丙酮/DMSO 混合物中环化,得到预期的 3-氨基-5-芳基‐4-(乙基硫基)噻吩-2-羧酸衍生物,产率合理。