Aminoindolines versus
Quinolines: Mechanistic Insights into the Reaction between 2-Aminobenzaldehydes
and Terminal Alkynes in the Presence of Metals and Secondary Amines
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Abstract
DFT computational studies in the cyclization of aminoalkyne
(see structure), which is generated in situ by 2-aminobenzaldehydes
and terminal alkynes in the presence of metals and secondary amines,
has been investigated. The study revealed that the mode of cyclization
(<i>exo</i> vs <i>endo</i>) depends on the protecting
group on nitrogen, the oxidation state of copper, and substitution
on alkyne