Moreover, the application of this EnT [2+2]-cycloaddition protocol to polyborylated alkenes, including tri-and tetra-borylated alkenes, has opened up new avenues for the synthesis of highly borylated cyclobutanes, a category that has been underexplored. These reactions showed good tolerance to various substituents and enabled the formation of 1,1,2-tri-and 1,1,2,2 tetra-borylated cyclobutanes. Furthermore, the synthetic utility of the polyborylated cyclobutane products was demonstrated through their oxidation to yield diverse oxygenated scaffolds, including cyclobutanones and γ-lactones.