An efficient base-promoted synthesis of cinnolines from 2-nitrobenzyl alcohol and benzylamine via an intramolecular redox cyclization reaction. The formation of intermediate 2-nitrosobenzaldehyde plays an important role in this transformation.
A tandem
reaction for the synthesis of phenanthrenes from arynes
and α-(bromomethyl)styrenes is reported. The transformation
proceeds via an ene reaction of α-(bromomethyl)styrenes with
arynes, followed by a [4 + 2] cycloaddition reaction. The reaction
generates 9-benzylphenanthrene derivatives in moderate to excellent
yields.
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