The ozonation of the O-methyloximes has been investigated. Besides the corresponding ketones, ketone diperoxides, and N-methoxyamides were produced. The stereochemistry of the ketone diperoxides was studied by the NMR technique.
The [1,3]-alkoxy rearrangement reactions of N-alkoxyanilines were efficiently catalyzed by cationic N-heterocycliccarbene (NHC)-Cu catalysts in affording 2-alkoxyaniline derivatives in good to excellent yields with high functional group compatibility. For N-alkoxyanilines having an electron-withdrawing substituent at the meta-position, the alkoxy group selectively migrated to the more hindered ortho-position
Anionic [3,3]-sigmatropic rearrangement of N-phenyl-O-acylhydroxylamines to o-aminophenylcetic acids.
作者:Yasuyuki Endo、Shoji Hizatate、Koichi Shudo
DOI:10.1016/0040-4039(91)85091-i
日期:1991.6
N-Phenyl-O-acylhydroxylamines rearrange under basic conditions to afford o-aminophenylacetic acids. The rearrangement can be rationalized in terms of [3,3]-sigmatropicshifts of an enolized N-phenyl-O-acylhydroxyl-amine.
AlCl3-mediated regioselective migration of a methoxy group of N-methoxy-N-phenylamides to the ortho position of the phenyl ring
作者:Yasuo Kikugawa、Masahiro Shimada
DOI:10.1039/c39890001450
日期:——
AlCl3-mediated decomposition of N-methoxy-N-phenylamides in dichloroethane leads to regioselective intramolecular migration of the methoxygroup from the nitrogen to the orthoposition of the phenylring via a tight ion pair intermediate.
ortho/para-functionalized amine scaffolds from arylhydroxylamines is described. The transformation was featured with new electrophilic trifluoromethylthiolated reagents, good functional group tolerance, and late-stage modification of complex bioactive scaffolds, providing a rapid access to prepare numerous trifluoromethyl- and difluoromethyl-substituted sulfoxides. Mechanism studies and density functional