Isocyanide-based three-component [2+2+1]-cycloaddition reactions from isocyanides,
activated alkynes, and isatylidene malononitriles were investigated to provide a new
access to spirocyclic oxindole with five-membered carbon rings. The displacement of
isatylidene malononitrile with oxindolylideneacetate essentially results in opposite
regioselectivity, which adds to its attractiveness.
Key words
isocyanide - activated alkyne - isatylidene malononitrile - spirocyclic oxindole
- oxindolylideneacetate