Synthesis of Bioactive 4-Oxo-4<i>H</i>-Chromenes Bearing Heterocyclic Systems from Hydrazonecarbodithioic Acid and Thiocarbohydrazone
作者:T. E. Ali、S. A. Abdel-Aziz、H. M. El-Shaaer、F. I. Hanafy、A. Z. El-Fauomy
DOI:10.1080/10426500701851291
日期:2008.8.4
Condensation 4-oxo-4H-chromene-3-carboxaldehydes (1a,b) with acid hydrazine-carbodithioic acid and/or thiocarbohydrazide afforded hydrazonecarbodithioic acid 2, monothiocarbohydrazone 3a,b and bisthiocarbohydrazone 4, respectively. Heterocyclization of 2–4 via reaction with oxygen, sulfur and/or halogen reagents in different media yielded pyridazinethione 5; 1,3-thiazoles 7; pyrazoles 9–12; 1,2,4-thiadiazoles
4-氧代-4H-色烯-3-甲醛(1a,b)与酸式肼-碳二硫代酸和/或硫代碳酰肼的缩合反应分别得到腙碳二硫代酸2、单硫代碳酰腙3a、b和双硫代碳酰肼4。2-4 通过与不同介质中的氧、硫和/或卤素试剂反应进行杂环化产生哒嗪硫酮 5;1,3-噻唑 7; 吡唑 9-12;1,2,4-噻二唑 8,13,14 和 23;1,2,4-三唑硫酮 15–17;1,2,4-三嗪硫酮 18-22;咪唑硫酮 24 和嘧啶硫酮 25 衍生物。筛选了一些新合成化合物的抗真菌活性。所有产品的配方都是通过元素分析和光谱数据(IR、1H NMR 和质谱)推导出来的。