Acylation of Nitronates: [3,3]-Sigmatropic Rearrangement of <i>in Situ</i> Generated <i>N</i>-Acyloxy,<i>N</i>-oxyenamines
作者:Aleksandr O. Kokuev、Yulia A. Antonova、Valentin S. Dorokhov、Ivan S. Golovanov、Yulia V. Nelyubina、Andrey A. Tabolin、Alexey Yu. Sukhorukov、Sema L. Ioffe
DOI:10.1021/acs.joc.8b01652
日期:2018.9.21
affords α-acyloxyoxime derivatives via an umpolung functionalization of the α-position. This transformation involves generation of hitherto unknown N-acyloxy,N-oxyenamines and their fast [3,3]-sigmatropic rearrangement driven by the cleavage of the weak N–O bond. The reaction has a broad scope, and it is regioselective in the case of nitronates possessing nonsymmetrically substituted α-positions. Application
硝酸酯的酰化通过α位的功能化而提供α-酰氧基肟衍生物。这种转变涉及到迄今为止未知的N-酰氧基,N-氧化烯胺的产生及其由弱N-O键断裂驱动的快速[3,3]-σ重排。该反应具有广泛的范围,并且在具有非对称取代的α-位的硝酸盐的情况下具有区域选择性。提出了将其应用于氨基甲酸酯和顺式-克拉烯酰胺的正式全合成。