ChemInform Abstract: Synthesis of Amino‐Cyclobutanes via [2 + 2] Cycloadditions Involving Keteniminium Intermediates. Issue 41 (September 2016) - Kolleth, Amandine
Abstract: Ketene iminium salts, generated by treatment of amides with Tf2 O undergo a [2 + 2] cycloaddition with alkenes to form unstable cyclobuteneiminium salts which are reduced to give aminocyclobutanes (III) and (VIII).