Divergent Access to Polycyclic <i>N</i>-Heterocyclic Compounds through Büchner-Type Dearomatization Enabled Cycloisomerization of Diynamides under Gold Catalysis
Various linear and non-linear primaryamines were oxidatively deaminated to afford the corresponding carbonylcompounds in good to excellent yields by the following procedure: (i) initial formation of their N-cyclohexylated or N-mesylated derivatives, (ii) subsequent oxidation of these derivatives by using N-tert-butylphenylsulfinimidoyl chloride (1) and DBU, (iii) one-pot acid-hydrolysis of thus formed