Thermodynamic equilibration of dihydropyridone enolates: application to the total synthesis of (+/−)-epiuleine
作者:Edward S. Tasber、Robert M. Garbaccio
DOI:10.1016/j.tetlet.2003.10.030
日期:2003.12
as its vinyl triflate (3). This enolate interconversion is dependent on the dihydropyridone C-2 substituent and can be interpreted in terms of conformational analysis. This novel scaffold (3) opens another avenue for the strategic deployment of dihydropyridones into both natural product synthesis and drug discovery. To this end, this method is highlighted by its use as a key step in a total synthesis
在将2-取代的二氢吡啶酮(1)还原成1,4-之后,可以将所需的“动力学”烯醇酸酯在加热后进行异构化,以分离出热力学烯醇酸酯作为其三氟甲磺酸乙烯酯(3)。该烯醇化物相互转化取决于二氢吡啶酮C-2取代基,并且可以根据构象分析来解释。这种新颖的支架(3)为将二氢吡啶酮类策略性部署到天然产物合成和药物发现中开辟了另一条途径。为此,该方法通过将其用作(+/-)Epiuleine(14)的全合成中的关键步骤而得到强调。