Angewandte Chemie - International Edition p. 8325 - 8327 (2009)
Update date:2022-08-04
Topics:
Rizk, Toni
Bilodeau, Eric J.-F.
Beauchemin, Andre M.
A management issue! Various pyridines and pyrazines can be efficiently accessed from simple acyclic precursors using an intramolecular hydroamination/isomerization/aromatization sequence (see scheme). ρ-Toluenesulfonic acid (2 mol%) is used to catalyze this novel alkyne annulation, in which the oxime group allows for a subsequent redoxneutral aromatization step to occur.
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