Chemoselective formation of symmetrically linked bisisoxazole units: Steps toward isoxazoline/isoxazolidine based macrocycles
作者:Margaret T. McKiernan、Frances Heaney
DOI:10.1016/0040-4039(96)00886-6
日期:1996.6
Symmetricallylinkedbisisoxazole derivatives can be formed from a chemselective one-pot three component reaction between oximes, dipole generating and dipole trapping components. The use of bifunctional dipole generating moieties affords bisisoxazolines (11), linked through their N-atoms. The employment of bifunctional dipolarophilic agents leads to bisisoxazolidines (3 and 4) linked via their C-5
Cycloaddition reactions of oximes; powerful new carbon–carbon bond forming methodology
作者:Paul Armstrong、Ronald Grigg、William J. Warnock
DOI:10.1039/c39870001325
日期:——
Oximes react with Michael acceptors and dipolarophiles, usually regio- and stereo-specifically, via a tandem Michael addition–1,3-dipolar cycloaddition process, to give isoxazolidines in good yield; analysis of the tandem process identifies four broad synthetic variants, and examples of those involving initial intermolecular Michael addition are given.