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DOI: 10.1055/s-0029-1216860
Synthesis of Piperidinones through a Radical Cascade
Publication History
Publication Date:
29 May 2009 (online)

Abstract
Fused piperidinones were assembled from chiral allylsilanes possessing an oxime moiety using a stereocontrolled formal [2+2+2] radical-ionic process. The cascade involves the addition of an α-iodo ester to an ene oxime, which is then followed by a 5-exo-trig cyclization onto the aldoxime function producing an alkoxyaminyl radical species that finally lactamizes to afford piperidinones. Application of the radical cascade to ketoximes led instead to cyclopentanes incorporating two ester fragments as a result of a recombination process.
Key words
radical reactions - silicon - domino reactions - piperidines - cyclizations
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References
The term [2+2+2] refers here as a process involving 2 atoms + 2 atoms + 2 atoms and not to a concerted process.