Recent Advances on High-Order Dipolar Annulations of Donor–Acceptor Cyclopropanes/Cyclobutanes

Abstract This short review summarizes the recent impressive developments on the high-order dipolar annulations (HODAs) of donor–acceptor cyclopropanes (DACs) and donor–acceptor cyclobutanes (DABs) to afford medium-sized (hetero)cycles. 1 Introduction 2 (3+m) (m > 3) Annulations of Donor–Acceptor Cyclopropanes 2.1 (3+4) Annulations 2.2 (3+5) Annulations 3 (4+m) (m > 2) Annulations of Donor–Acceptor Cyclobutanes 4 Conclusion