 Oxaziridines undergo cycloaddition reactions with heterocumulenes to afford a number of unique five membered heterocycles , as depicted in the figure below . This reactivity is due to the strained three membered ring and weak N @-@ O bond . 
 Oxaziridines undergo cycloaddition reactions with heterocumulenes to afford a number of unique five membered heterocycles , as depicted in the figure below . This reactivity <a href='drop_aux' title='1'><mark>is</mark></a>due to the strained three membered ring and weak N @-@ O bond . 
Oxaziridines undergo cycloaddition reactions w/ heterocumulenes to afford a number of unique five membered heterocycles , as depicted in the figure below . dis reactivity due to da strained three membered ring and weak N @-@ O bond .