Synthesis of Densely Substituted Pyridine Derivatives from 1-Methyl-1,3-(ar)enynes and Nitriles by a Formal [4+2] Cycloaddition Reaction
作者:Dandan He、Bowen Wang、Kanghui Duan、Yang Zhou、Meng Li、Huanfeng Jiang、Wanqing Wu
DOI:10.1021/acs.orglett.1c04192
日期:2022.2.18
densely substituted pyridine derivatives from 1-methyl-1,3-(ar)enynes and nitriles via a formal [4+2] cycloaddition has been established. The well-balanced affinities of two alkali metal salts enable C(sp3)–H bond activation and excellent chemo- and regioselectivities. Experimental studies revealed that nitrile functions only as a partial nitrogen source for pyridine synthesis, and the addition of a metalated
已经建立了一种通过形式 [4+2] 环加成从 1-甲基-1,3-(ar)enynes 和腈类组装密集取代的吡啶衍生物的有吸引力的方法。两种碱金属盐的平衡亲和力使 C(sp 3 )-H 键活化和优异的化学和区域选择性成为可能。实验研究表明,腈仅作为吡啶合成的部分氮源,将金属化亚胺中间体添加到分子内炔烃是限速步骤。