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。