Regio- and Diastereoselective 1,3-Diploar Cycloaddition of Imidazoline 3-Oxides to Styrene
摘要:
Delta(3)-Imidazoline 3-oxides (1) underwent regio- and diastereoselective cycloaddition with styrene to give perhydroimidazo[1,5-b]isoxazoles (3). Thermally induced retro cycloaddition of compounds (3) was demonstrated.
Effect of iminic nitrogen substituents on [4+2] versus [3+2] cycloaddition pathways in reactions of nitrosoalkenes with simple acyclic imines: an experimental and theoretical investigation
作者:Alka Marwaha、P.V. Bharatam、M.P. Mahajan
DOI:10.1016/j.tetlet.2005.08.142
日期:2005.11
The results of experimental and theoreticalinvestigations on the mechanism of competitive [3+2] versus [4+2] cycloadditionreactions of simple acyclic imines with nitrosoalkenes are reported. The effect of substituents on the iminic nitrogen in influencing the cycloaddition pathways has been meticulously explored.
New Methods for the Synthesis of Imidazoline-N-Oxides
作者:Necdet Coskun、Dogan Sümengen
DOI:10.1080/00397919308011268
日期:1993.6
DELTA3-Imidazoline-3-oxides were prepared by the reaction of corresponding aromatic Schiff bases with syn-2-bromoacetophenone oxime. 5,6-Dihydro-4H-1,2,5-oxadiazines were isolated as byproduct in some instances.