Nitro-Spirocyclization of Biaryl Ynones with <i>tert</i>-Butyl Nitrite: Access to NO<sub>2</sub>-Substituted Spiro[5,5]trienones
作者:Yang Li、Lijun Li、Changyou Guo、Qinqin Yan、Hongxun Zhou、Ying Wang、Zhong-Quan Liu、Zejiang Li
DOI:10.1021/acs.joc.3c00087
日期:——
metal/peroxide-free involved simple cascade 6-exo-trig spirocyclization of tert-butyl nitrite with biaryl ynones has been finished, which resulted in various NO2-modified spiro[5,5]trienones with good regioselectivity/yields. A variety of scaled-up experiments, reduction/epoxidation operations, and mechanistic studies were performed to verify the merits and spirocyclization process of this radical system. Finally, the
亚硝酸叔丁酯与联芳基炔酮的无金属/过氧化物简单级联 6- exo - trig 螺环化反应已经完成,产生了具有良好区域选择性/产率的各种 NO 2修饰的螺[5,5] 三烯酮。进行了各种放大实验、还原/环氧化操作和机理研究,以验证该自由基系统的优点和螺环化过程。最后,通过单晶X射线衍射证实了螺环的结构。