The chemistry of donor-acceptor cyclopropanes (DACs) is a rapidly developing field in modern organic synthesis. These stressed small carbocycles provide an attractive basis for the synthesis of acyclic as well as five-, six-, and seven-membered compounds. . Many organic reactions are known for DACs . Three main types of reactions of DACs in which donor and acceptor substituents are located vicinal can be distinguished (Scheme 1) . Ring-opening reactions involve the transformation of DAC by electrophilic and nucleophilic reagents in the presence of various Lewis acids (Scheme 1, ). This type of reaction can be used to produce 1,3-bifunctionalized compounds with an open chain, and it is widely used in the synthesis of biologically active molecules . DACs are often regarded as synthons for 1,3zwitterionic intermediates, which undergo cycloaddition and annulation reactions (Schemes 1, (2) and ( )). Indeed, the capacity of DACs to engage in cycloadditions provides access to a diverse range of carbocyclic and heterocyclic structures. . The rearrangement of DACs leads to the formation of unsaturated five-membered heterocycles, thus providing a metalfree approach to connected heterocyclic structures (Schemes 1, (2) and ( )). This paper focuses on the [3+2]-cycloaddition reaction of DACs with aldehydes, which provides a wide range of cyclic compounds depending on the Lewis acid used.