New Rearrangement of Conjugated Cyclic Ene Nitroso O-Trimethylsilyl Acetals: Convenient Synthesis of Dihydro-2H-pyran-3-one and Dihydrofuran-3-one Oximes
The nucleophile-induced rearrangement of cyclic N-alkoxy-N-(silyloxy)enamines was investigated. As a result, a new strategy for the synthesis of β-pyranone and β-furanone derivatives from nitrocompounds is suggested. nitroso acetals - rearrangement - nitrogen heterocycles - 1,2-oxazines - aliphatic nitrocompounds
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