An Environmentally Friendly Oxidation System for the Selective Oxygenation of Aldimines to Oxaziridines with Anhydrous TBHP and Alumina-Supported MoO3 as a Recyclable Heterogeneous Catalyst
作者:Sweety Singhal、Suman L. Jain、V. V. D. N. Prasad、Bir Sain
[Bmim]BF4-immobilized rhenium-catalyzed highly efficient oxygenation of aldimines to oxaziridines using solid peroxides as oxidants
作者:Suman L. Jain、Sweety Singhal、Bir Sain
DOI:10.1016/j.jorganchem.2007.03.004
日期:2007.6
Various rhenium-based catalysts immobilized in [bmim]BF4 were found to be efficient for oxygenation of various aldimines to the corresponding oxaziridines in excellent yields under mild conditions using solid peroxides like UHP, SPC and SPB as oxidants. Among the various rhenium-based catalysts studied, MTO was found to be most efficient. The reusability and recyclability of MTO immobilized in [bmim]BF4 was established by using it for three subsequent cycles for oxygenation of benzylidine-tert-butylamine using UHP as oxidant. (C) 2007 Elsevier B.V. All rights reserved.
Ring Expansion of Donor–Acceptor Cyclopropane via Substituent Controlled Selective <i>N</i>-Transfer of Oxaziridine: Synthetic and Mechanistic Insights
A distinctive N-substituent controlled electrophilic N-transfer of oxaziridines with donor-acceptor cyclopropanes in the presence of MgI2 is reported. Contrary to earlier reports, the oxaziridine having bulkier N-substituents can also give N-transferred product instead of the O-transferred one. Interestingly, the oxaziridines having alpha-H containing N-substituents lead to the pyrrolidine derivatives through [3 + 2] cycloaddition. A mechanistic reasoning for this divergent reactivity 18 depicted by density functional theory calculations and validated through energy decomposition analysis.
Photochemical Beckmann rearrangements. Correspondence between substituent effects in oximes and oxaziridines
作者:Yoshiro Ogata、Katsuhiko Takagi、Kiyohiko Mizuno
DOI:10.1021/jo00140a019
日期:1982.9
Reaction of oxaziridine with heterocumulene. A ketene, isocyanates, and carbodiimide