作者:Kamyar Afarinkia、Akmal Bahar、Michael J. Bearpark、Yésica Garcia-Ramos、Andrea Ruggiero、Judi Neuss、Maushami Vyas
DOI:10.1021/jo051646i
日期:2005.11.1
A variety of 5-chloro-2(H)-1,4-oxazin-2-ones bearing a range of substituents at their 3- and 6-positions undergo Diels−Alder cycloaddition as a 2-azadiene component with electron-rich, electron-deficient, and electron-neutral dienophiles. These reactions proceed with moderate regio- and stereoselectivity to afford relatively stable and readily isolable bridged bicyclic lactone cycloadducts. Chemical
各种在其3和6位带有一系列取代基的5-氯-2(H)-1,4-恶嗪-2-酮经历了Diels-Alder环加成反应,成为具有电子富集的2-azadiene组分,电子缺陷和电子中性的亲二烯体。这些反应以适度的区域选择性和立体选择性进行,以提供相对稳定且易于分离的桥连双环内酯环加合物。这些环加合物的化学操作提供了高度取代且功能丰富的哌啶。使用密度泛函理论(B3LYP / 6-31G *)通过计算研究了5-氯-2(H)-1,4-恶嗪-2-酮的环加成反应的区域和立体化学偏好。