Table 2. Substrate scope of redox-active esters ^a .

^aIsolated yield for 0.2 mmol scale reaction. Reaction conditions are the same as those for Table 1, entry 17.

^bIsolated yield for 0.2 mmol scale one-pot reaction.

^cIsolated yield for 5.0 mmol scale one-pot reaction. Ratio of desired product/addition by-product >50 : 1 unless otherwise noted. Boc = tert-butoxycarbonyl. Ts = tosyl.