TY - GEN AU - Eisold,Michael AU - Baumann,Andreas N AU - Kiefl,Gabriel M AU - Emmerling,Sebastian T AU - Didier,Dorian TI - Unsaturated Four-Membered Rings: Efficient Strategies for the Construction of Cyclobutenes and Alkylidenecyclobutanes SN - 1521-3765 PY - 2018///0131 N1 - Publication Type: Journal Article UR - https://doi.org/10.1002/chem.201604585 ER -