Regioselective Cycloaddition of 3-Azetidinones and 3-Oxetanones with Alkynes through Nickel-Catalysed Carbon-Carbon Bond Activation
作者:Kelvin Y. T. Ho、Christophe Aïssa
DOI:10.1002/chem.201200167
日期:2012.3.19
Get in the ring! The first examples of transition‐metal‐catalysed CC bond activation of 3‐azetidinones and 3‐oxetanones are reported. In the presence of a nickel catalyst and alkynes, a regioselective and high‐yielding [4+2] cycloaddition occurs, leading to the formation of pyridinones, pyranones and eventually 4,5‐disubstituted 3‐hydroxypyridines (see scheme).
加油!过渡金属催化的C的第一实施例报道C键活化的3-氮杂环丁酮和3-氧杂环丁烷酮。在镍催化剂和炔烃的存在下,会发生区域选择性和高产率的[4 + 2]环加成反应,导致形成吡啶酮,吡喃酮,并最终形成4,5-二取代的3-羟基吡啶(参见方案)。