Sequential oxidation/thermal induced intramolecular [2+2] cycloaddition of propynol-vinylidenecyclopropanes: access to novel cyclobutene-containing spiro[2.3]hexenes
Keywords: Propynol-vinylidenecyclopropane; Oxidation; Thermal induced; Intramolecular [2+2] cycloaddition; Cyclobutene; Spiro[2.3]hexene;