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

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 Introduction2 (3+m) (m > 3) Annulations of Donor-Acceptor Cyclopropanes2.1 (3+4) Annulations2.2 (3+5) Annulations3 (4+m) (m > 2) Annulations of Donor-Acceptor Cyclobutanes4 Conclusion