Cu-Catalyzed Concise Synthesis of Pyridines and 2-(1<i>H</i>)-Pyridones from Acetaldehydes and Simple Nitrogen Donors
作者:Ziyuan Li、Xiaoqiang Huang、Feng Chen、Chun Zhang、Xiaoyang Wang、Ning Jiao
DOI:10.1021/ol5035996
日期:2015.2.6
A highly selective copper-catalyzed concise synthesis of 3,5-diarylpyridine and 2-(1H)-pyridone has been achieved through cascade Chichibabin-type cyclization, C(sp3)–C(sp3) cleavage, and aerobic oxidation. Azide, ceric ammonium nitrate (CAN), and 2-aminopyridine are disclosed as efficient nitrogen donors in this Cu-catalysis using O2 as the oxidant. Water and molecular oxygen were employed as the
通过级联的Chichibabin型环化,C(sp 3)–C(sp 3)裂解和需氧氧化,已实现了高选择性铜催化的3,5-二芳基吡啶和2-(1 H)-吡啶酮的简明合成。在使用O 2作为氧化剂的Cu催化中,叠氮化物,硝酸铈铵(CAN)和2-氨基吡啶被公开为有效的氮供体。在氧合作用的情况下,水和分子氧被用作氧源。