A new route for the synthesis of novel spirooxindoles from isocyanides, dialkyl acetylenedicarboxylates,
and N-substituted isatylidene derivatives through [3+2] cycloaddition has been developed.
This method has several advantages, such as high regioselectivity, high yields, readily
available starting materials, and one-pot operations. The synthetic alkyne-containing
spirooxindoles could also be used in the selective synthesis of triazole-containing
spirocyclic compounds using a copper azide–alkyne cycloaddition (CuAAC) reaction.
Key words
multicomponent reaction - spirooxindoles - [3+2] cycloaddition - CuAAC reaction -
triazoles