A novel tandem aziridination/rearrangement reaction of allylic alcohols has been discovered, in which the significant accelerating effect of silica gel has been identified. On the basis of this methodology, an efficient and highly stereoselectiveapproach to various 2-quaternary Mannich bases has been put in place, readily providing an alternative route to the conventional vicinal amino-functionalization
A Facile Approach to Oximes and Ethers by a Tandem NO
<sup>+</sup>
‐Initiated Semipinacol Rearrangement and H‐Elimination
作者:Jia‐Wei Dong、Tongmei Ding、Shu‐Yu Zhang、Zhi‐Min Chen、Yong‐Qiang Tu
DOI:10.1002/anie.201807861
日期:2018.10
NO+‐initiated semipinacol rearrangement and subsequent proton elimination. The procedure enabled the rapid construction of a series of oximes and oxime ethers with spiro quaternary stereocenters from allylic silyl ethers. Additional features of this reaction include wide substrate tolerance as well as the commercial availability of the safe nitrosation reagent NOBF4. The key N‐heterotricyclic cores of three natural