Reaction of N,N-Dioxyenamines with Anhydrides of Carboxylic and Sulfonic Acids; A New Method for the Synthesis of α-Hydroxyoxime Derivatives
作者:Alexey Lesiv、Andrey Tabolin、Sema Ioffe
DOI:10.1055/s-0029-1216907
日期:2009.9
The reactions of N,N-dioxyenamines with carboxylic and sulfonic acid anhydrides were investigated. A newmethod for the synthesis of α-hydroxyoxime derivatives via the reaction of N,N-dioxyenamines with trifluoroacetic anhydride is described. 1,2-oxazine - trifluoroacetic anhydride - hydroxyoxime - enamine - rearrangement
Accessing Polysubstituted NH Pyrroles from Nitroalkenes via [4+2]‐Cycloaddition/Reductive Ring Contraction Strategy
作者:Evgeny V. Pospelov、Alexander V. Zhirov、Baglan Kamidolla、Alexey Yu. Sukhorukov
DOI:10.1002/ejoc.202400627
日期:2024.8.12
of nitroalkenes with enol ethers followed by reductive ring contraction of the resulting cyclic nitronates provides a new access to polysubstituted NH pyrroles. Unlike conventional synthetic routes (Barton-Zard, Knorr, Hantzsch, Van Leusen pyrrole syntheses), this strategy affords NH pyrroles that do not necessarily contain a EWG group in the ring.