4H‐Pyran units are frequently present in molecules with significant biological and pharmaceutical activities. Herein, we present the first enantioselective formal [3+3] cycloaddition between 2‐(1‐alkynyl)‐2‐alken‐1‐ones and β‐keto esters catalyzed by a cyclohexyldiamine‐based thiourea‐tertiary amine bifunctional catalyst. Under the mild and eco‐friendly conditions, a wide range of polysubstituted 4H‐pyrans
4 H- Pyran单元经常存在于具有重要
生物学和药学活性的分子中。本文中,我们介绍了由环己基二胺基
硫脲叔胺双功能催化剂催化的2-(1-炔基)-2-链烯-1-酮与β-
酮酯之间的首次对映选择性形式[3 + 3]环加成反应。在温和且生态友好的条件下,以中等收率和良好的对映选择性获得了多种多取代的4 H-
吡喃。