Cycloaddition of Fluorenone <i>N</i>-Aryl Nitrones with Methylenecyclopropanes and Sequential 1,3-Rearrangement: An Entry to Synthesis of Spirofluorenylpiperidin-4-ones
作者:Xiao-Pan Ma、Jie-Feng Zhu、Si-Yi Wu、Chun-Hua Chen、Ning Zou、Cui Liang、Gui-Fa Su、Dong-Liang Mo
DOI:10.1021/acs.joc.6b02544
日期:2017.1.6
highly selective 1,3-rearrangement to give the desired product. The stereochemistry of the spirofluorenylpiperidin-4-one could be controlled by the cycloaddition and sequential rearrangement strategy. Furthermore, the spirofluorenylpiperidin-4-ones could be not only prepared in one-pot procedure but also converted to useful scaffolds by reduction or oxidation conditions.
从芴酮N-芳基硝酮和亚甲基环丙烷可以容易地合成各种螺芴基哌啶-4-酮。该方法涉及初始的环加成反应以形成5-螺环丙烷-异恶唑啉,对其进行高度选择性的1,3-重排以得到所需的产物。螺芴基哌啶-4-酮的立体化学可通过环加成和顺序重排策略控制。此外,螺芴基哌啶-4-酮不仅可以一锅法制备,而且还可以通过还原或氧化条件转化为有用的支架。