Tandem Intramolecular Nicholas and Pauson−Khand Reactions for the Synthesis of Tricyclic Oxygen-Containing Heterocycles
作者:Miriam M. Quintal、Kristina D. Closser、Kevin M. Shea
DOI:10.1021/ol0479141
日期:2004.12.1
[reaction: see text] Simple acyclic enynes can be easily converted into tricyclic ethers upon treatment with Co2(CO)8 followed by Nicholas and Pauson-Khand reactions. Tricyclic [5,8,5]- and [5,7,5]-systems can be prepared in high overall yields in only seven synthetic steps.
[反应:见正文]用Co2(CO)8处理后,简单的无环烯炔很容易转化为三环醚,随后进行尼古拉斯和Pauson-Khand反应。三环[5,8,5]-和[5,7,5]-系统仅需七个合成步骤即可制备,并且收率高。