作者:Guang-Fan Han、Ming Wang、Li-Zhuang Chen、Xiao-Lei Hu
DOI:10.1002/jhet.897
日期:2012.7
The Knoevenagel reactions of malononitrile with acetophenone or 4‐substituted acetophenons were carried to give the corresponding 2‐(1‐aryle thylidene)malononitriles, which was further cyclized with sulfur using NaHCO3 as catalysts to generate 2‐amino‐5‐arylthiophene‐3‐carbonitrile 2. The intermediate enamines 3 were prepared by refluxing of 2 with 5‐substituted‐1,3‐cyclohexanedione using p‐toluenesulfonic
进行丙二腈与苯乙酮或4-取代的苯乙酮的Knoevenagel反应,得到相应的2-(1-芳基乙叉基)丙二腈,使用NaHCO 3作为催化剂,将其与硫进一步环化,生成2-氨基-5-芳基噻吩-3乙腈2。使用对甲苯磺酸作为催化剂,通过将2与5个取代的1,3-环己二酮回流,制得中间体烯胺3。在存在K 2 CO 3的情况下,通过环化3合成了标题化合物4-氨基-3-芳基-7-取代-7,8-二氢噻吩并[2,3- b ]喹啉-5(6 H)-one和Cu 2 Cl 2。所有化合物的结构均通过元素分析,IR,MS和1 H-NMR光谱进行表征。