Convenient synthesis of linear 2<i>H</i>,6<i>H</i>-pyrano[3,2-<i>g</i>] chromenes from natural occurring compound; visnagin
作者:Anhar Abdel-Aziem、Eslam R. El-Sawy、Gilbert Kirsch
DOI:10.1080/00397911.2019.1671455
日期:2019.12.17
Abstract A simple and convenient rout for the synthesis of linear 2-imino-2H,6H-pyrano[3,2-g] chromen-6-ones and 2H,6H-pyrano[3,2-g]chromene-2,6-diones has been described starting from natural occurring furochromone; visnagin (1). Ring opening of 1 yielded 6-formyl-7-hydroxy-5-methoxy-2-methylchromone (2), which underwent reaction with different acetonitrile derivatives furnished 2-imino-2H,6H-pyrano[3
摘要 合成线性 2-imino-2H,6H-pyrano[3,2-g] chromen-6-ones 和 2H,6H-pyrano[3,2-g]chromene-2,6 的简便途径-二酮已被描述为从天然存在的呋喃色酮开始;维纳斯金 (1). 1 的开环产生 6-formyl-7-hydroxy-5-methoxy-2-methylchromone (2),它与不同的乙腈衍生物反应得到 2-imino-2H,6H-pyrano[3,2-g] chromen- 6 个 (5a–h)。5a-h 的酸水解导致 2H,6H-吡喃并[3,2-g]色烯-2,6-二酮 (6a-h) 的形成。基于元素分析和光谱数据阐明了合成化合物的结构。美国国家癌症研究所 (NCI, Bethesda, USA) 选择了全部目标化合物,以单剂量 (10-5 M) 对 60 种人类癌细胞系进行体外抗癌活性。图形概要