Regiocontrolled Cobalt-Catalyzed Diels−Alder Reactions of Silicon-Functionalized, Terminal, and Internal Alkynes
作者:Gerhard Hilt、Judith Janikowski
DOI:10.1021/ol802837m
日期:2009.2.5
The efficient control of the regiochemistry of the Diels−Alder adducts which are formed in excellent yields from 1,3-dienes and alkynylsilanes can be realized utilizing cobalt complexes with a pyridine-imine ligand or a dppe ligand, respectively. The application of 2-trimethylsilyloxy-1,3-butadiene leads to a very interesting cyclohexenone derivative suitable for further transformations.
通过分别与吡啶-亚胺配体或dppe配体形成钴配合物,可以有效地控制由1,3-二烯和炔基硅烷以优异收率形成的Diels-Alder加合物的区域化学。2-三甲基甲硅烷氧基-1,3-丁二烯的应用产生了非常有趣的适合进一步转化的环己烯酮衍生物。