When oxaziridine 9 was treated with an excess of lithium amide 1, we observed formation of pyrrolidine 4 (Table 11). This implicates aminyl radical 2 as an intermediate in the reaction and strongly suggests that an electron-transfer step occurred. The last column in Table I1 is the ratio of the moles of pyrrolidine 4 formed in the reactions to the moles of 10 formed. 8 Despite the scatter, the consistency of this ratio leads us to believe that lithium amide ...
