3-Halomethylated cyclic nitronates: synthesis and nucleophilic substitution
作者:Andrey A. Mikhaylov、Alexander D. Dilman、Marina I. Struchkova、Yulia A. Khomutova、Alexander A. Korlyukov、Sema L. Ioffe、Vladimir A. Tartakovsky
DOI:10.1016/j.tet.2011.04.078
日期:2011.6
group attached to the C-3 atom of five- and six-memberedcyclic nitronates (isoxazoline N-oxides and oxazine N-oxides, respectively) has been studied. The process involves silylation of starting 3-methyl-substituted cyclic nitronates followed by halogenation of the resulting N-(silyloxy)enamines. While five- and six-memberedcyclic enamines behave similarly toward elemental bromine and iodine, their
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