Abstract
AbstractStrain in the ring engenders versatile reactivity that can be utilized for the synthesis of complex molecules by the assimilation of suitable substituents. In this context, vicinal donor‐acceptor cyclopropanes (DACs) serve as three‐carbon synthetic equivalents in organic synthesis from the last few decades. Owing to their zwitterionic nature, they have been frequently utilized in [3+n]‐annulation reactions with different dipolarophiles like aldehydes, imines, oximes, epoxides, aziridines, etc. This review highlights developed synthetic tools for annulation reactions of vicinal donor‐acceptor cyclopropanes with saturated and unsaturated heterocyclic compounds.
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