Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK.
Chemistry. 2012 Mar 19;18(12):3486-9. doi: 10.1002/chem.201200167. Epub 2012 Feb 22.
Get in the ring! The first examples of transition-metal-catalysed C-C 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).
进入拳击场!报告了首例过渡金属催化的 3-氮杂环丁酮和 3-氧杂环丁酮的 C-C 键活化的例子。在镍催化剂和炔烃的存在下,发生了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,最终生成 4,5-二取代的 3-羟基吡啶(见方案)。