Overcoming the Limitations of C−H Activation with Strongly Coordinating N-Heterocycles by Cobalt Catalysis
作者:Hui Wang、Mélanie M. Lorion、Lutz Ackermann
DOI:10.1002/anie.201603260
日期:2016.8.22
Strongly coordinating nitrogen heterocycles, including pyrimidines, oxazolines, pyrazoles, and pyridines, were fully tolerated in cobalt‐catalyzed C−H amidations by imidate assistance. Structurally complex quinazolines are thus accessible in a step‐economic manner. Our findings also establish the relative powers of directing groups in cobalt(III)‐catalyzed C−H functionalization for the first time.
在钴催化的CHH酰胺化反应中,通过亚氨酸盐的辅助作用,可以完全耐受包括嘧啶,恶唑啉,吡唑和吡啶在内的强配位氮杂环。因此,结构经济的喹唑啉可以逐步经济地获得。我们的发现还首次确定了钴(III)催化的CH官能团中的导向基团的相对能力。