SEARCH Articles Figures Tables 1.3- Dipolar reactions Cycloaddition five-membered rings formation Cycloaddition reactions 1,3-dipolar Cycloaddition reactions rings Cycloadditions 1,3-dipolar reactions Cycloadditions rings Five 3+2]-cycloadditions formation Five-membered ring Five-membered ring, formation Formation of five membered Membered formation Of 1,3-dipolar cycloaddition reactions Reactions of Cycloaddition Ring formation Ring formation reaction