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Beilstein J. Org. Chem. 2011, 7, 1334–1341, doi:10.3762/bjoc.7.157
Graphical Abstract
Scheme 1: Synthesis of [K+PEG]Br3−.
Scheme 2: Synthesis of functionalized piperidines.
Figure 1: X-ray structure showing the anti orientation of the phenyl rings at C2 and C6.
Scheme 3: A plausible mechanism for the formation of piperidines.