Chemistry of Tonghaosu Analogs: Novel Acid-Catalyzed Nucleophilic Addition to the Dienyl Acetal System
作者:Biao-Lin Yin、Wen-Min Wu、Tai-Shan Hu、Yu-Lin Wu
DOI:10.1002/ejoc.200300343
日期:2003.10
The acid-catalyzed nucleophilic addition reaction of spiroketal enol ether-containing tonghaosu analogs 2 was explored. Soft nucleophiles, such as mercaptans, alcohols and heteroaromatic compounds, gave rise exclusively to 1,6-adducts, while harder nucleophiles, such as Grignard reagents, afforded mixtures of 1,2- and 1,6-adducts. The reaction with cysteine and glutathione, which might be related to
探索了含螺缩酮烯醇醚的通皓苏类似物2在酸催化下的亲核加成反应。软亲核试剂,如硫醇、醇和杂芳族化合物,仅产生 1,6-加合物,而较硬的亲核试剂,如格氏试剂,产生 1,2- 和 1,6- 加合物的混合物。可能与昆虫拒食的作用方式有关的半胱氨酸和谷胱甘肽的反应也顺利进行。10 和 11 的 Friedel-Crafts 二聚反应分别得到二聚体 12 和 13。通过比较 1H NMR 光谱数据,我们还建议将文献中报道的天然产物化合物 9 的结构修改为化合物 13 的结构。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)