作者:Rama Kanwar Khangarot、Krishna P. Kaliappan
DOI:10.1002/ejoc.201100953
日期:2011.10
strategy. In this article, the synthesis of a variety of chiral β-lactams by the Kinugasa reaction between terminal alkynes and nitrones is described. These sugar-derived β-lactams were synthesized by the reaction between cyclic nitrones derived from different sugars, tartrate ester, and alkynes obtained from different sugars. The reaction gave moderate to good yields of β-lactams with high diastereoselectivity
β-内酰胺亚结构的重要性以几类β-内酰胺抗生素为例。在可用于获得这种有趣支架的合成路线中,Kinugasa 反应是一种收敛策略。在本文中,描述了通过末端炔烃和硝酮之间的衣笠反应合成多种手性 β-内酰胺。这些糖衍生的β-内酰胺是通过不同糖衍生的环状硝酮、酒石酸酯和不同糖衍生的炔烃之间的反应合成的。该反应以高非对映选择性得到中等至良好的β-内酰胺收率,主要产生单一产物。还解释了在这些反应中观察到的立体化学偏好。