In this task, you will be given a passage to read. A fill in the blank question will be given to you. Your answer should fit the blank appropriately.

The synthesis of aziridines from imines is another important application of the Johnson Corey Chaykovsky reaction and provides an alternative to amine transfer from oxaziridines . Though less widely applied , the reaction has a similar substrate scope and functional group tolerance to the carbonyl equivalent . The examples shown below are representative ; in the latter , an aziridine forms in situ and is opened via nucleophilic attack to form the corresponding amine . fill in the blank :The synthesis of aziridines from imines is another important application of the Johnson Corey Chaykovsky reaction and provides an __________________ to amine transfer from oxaziridines .
alternative