Concise Syntheses of the Cruciferous Phytoalexins Brassilexin, Sinalexin, Wasalexins, and Analogues: Expanding the Scope of the Vilsmeier Formylation
作者:M. Soledade C. Pedras、Mukund Jha
DOI:10.1021/jo0479866
日期:2005.3.1
the Vilsmeier formylation to indoline-2-thiones followed by a new aqueous ammonia workup procedure. Similarly, a very concise two-pot synthesis of the phytoalexins wasalexins using sequential formylation−amination of indolin-2-ones is described. Remarkably, this novel aqueous ammonia workup allows the sequential one-pot formylation−amination, expanding substantially the scope of the Vilsmeier formylation
通过将Vilsmeier甲酰化应用到二氢吲哚-2-硫酮上,然后进行新的氨水后处理程序,证明了植物抗毒素黄铜素,芥辣素和类似物的有效合成。类似地,描述了使用顺式吲哚-2-酮的甲酰化-氨化非常精确的两锅合成植物抗毒素wasalexins。引人注目的是,这种新颖的氨水后处理允许顺序进行一锅甲酰化氨化反应,从而大大扩大了吲哚啉-2-硫酮和吲哚-2-酮的维尔斯迈尔甲酰化作用的范围。据报道,甲酰化-胺化反应的检查和条件的优化,以及几种黄铜蛋白类似物的合成和抗真菌活性。