Rapid Assembly of Spiroisoxazolidines by [4 + 1] Dearomative Spiroannulation of α-Bromo-β-naphthol and Nitroolefin
作者:Mian Qi、Mengyao Li、Lu Bai、Jingjing Liu、Xinjun Luan
DOI:10.1021/acs.joc.3c00335
日期:2023.5.5
A novel [4 + 1] dearomative spiroannulation of α-halo-β-naphthol and nitroolefin has been developed for the direct construction of various spiroisoxazolidines in high chemo- and diastereoselectivity. Notably, halophenols (X = Cl and I) were also tolerated by this reaction. This transformation was realized through a sequence of electrophilic dearomatization/dehalogenation, and mechanistic studies revealed
开发了一种新型的 α-卤代-β-萘酚和硝基烯烃的 [4 + 1] 脱芳环化螺环化反应,用于以高化学选择性和非对映选择性直接构建各种螺异恶唑烷。值得注意的是,该反应也可以耐受卤酚(X = Cl 和 I)。这种转化是通过一系列亲电脱芳构化/脱卤化作用实现的,机理研究表明 C(sp 3 )–X 键断裂发生了不同的路径。此外,该方法的潜在应用通过几个进一步的转换得到了例证。