在 Lewis 碱催化剂存在下,Danishefsky 的二烯之间的 Lewis 碱催化的 Aza-Diels-Alder 型反应。一种合成取代的2,3-二氢吡啶-4-酮的有效方法
摘要:
描述了各种亚胺与 1-methoxy-3-trimethylsilyloxy-1,3-butadiene (Danishefsky's diene) 衍生物的 Aza-Diels-Alder 型反应,这些反应由 Lewis 碱如甲醇锂催化。该反应通过逐步途径进行,即首先通过亚氨基-羟醛反应,然后是酸介导的环化,以高产率提供相应的2,3-二氢吡啶-4-酮。An appropriate choice of the substituents on nitrogen plays important roles both in addition of the silyl enolates and in the subsequent annulation to form the desired cycloadducts.
One pot solid phase synthesis of 2-substituted 2,3-dihydropyridin-4(1H)-ones on Rinkamide-resin
作者:Michael Sax、Stefanie Berning、Bernhard Wünsch
DOI:10.1016/j.tet.2004.10.031
日期:2005.1
A novel solid phase synthesis of 2-substituted2,3-dihydropyridin-4(1H)-ones using Rinkamide-polystyrene-resin is described. The key step involves a hetero-Diels–Alder reaction of Danishefsky's diene with solid phase bound imines, which was carefully optimized. Using this method even ketones are transformed into 2,2-disubstituted dihydropyridones.