compounds. Herein, the tandem reactions of 4-Cl- and 2-Cl-substituted 3-(oxiran-2-yl)pyridines with a variety of ethanolamines for one-pot synthesis of pyrido[1,4]oxazocines have been developed under additive-free conditions. Note that this process represents a regioselectivity profile in view of the fact that a SN2-type ring-opening reaction of the oxirane moiety with the amino group and a SNAr-type etherification
对构建稠合中环[1,4]
恶唑辛的研究兴趣导致
生物活性化合物的发现迅速增长。在此,开发了4-Cl-和2-Cl-取代的3-(
环氧乙烷-2-基)
吡啶与多种
乙醇胺的串联反应,以一锅法合成
吡啶并[1,4]恶佐辛。免费条件。请注意,鉴于
环氧乙烷部分与
氨基和 S N的 S N 2 型开环反应这一事实,该过程代表了区域选择性特征。4-
氯或2-
氯吡啶部分分别与羟基进行Ar型醚化。良好的底物兼容性、温和的反应条件和原子经济性使该方案成为获取不常见双环结构的收敛且有效的选择。此外,还进行了克级反应和所得
吡啶并[1,4]恶佐辛的下游衍生化。