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Abstract
1-Azaspirocycles are important structures present in many drugs and natural products. This paper describes the silver-catalyzed tandem cyclization strategy, which provides atom-economical access to various azaoxa- and diazaspirocycles from alkynes containing two appended oxygen- and nitrogen-based nucleophiles. Intramolecular attack of the pendant nucleophile on the in situ-generated iminium intermediate is the key to the success of this transformation.
Supplementary materials
Title
Supporting Information
Description
General information, experimental procedures, characterization data, and NMR spectra.
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