Fig. 4: Gram-scale reaction and mechanistic studies.

a Gram-scale reaction. b Radical inhibition experiments. c Nonlinear effect of catalyst. d Investigation of intermediate azide. e The role of triple bond in enantiocontrol. f Proposed mechanism. TEMPO: 2,2,6,6-tetramethylpiperidoxyl, BHT: butylated hydroxytoluene, DPE: 1,1-diphenylethylene.