Fig. 4

Scope of alkenes. a Synthesis of α-azido esters. b Synthesis of β-azido esters. c Synthesis of γ-azido esters. d Synthesis of α,γ-azido esters. e Synthesis of an α,β-azido ester. f Synthesis of an α,β,γ-azido ester. g Synthesis of an azido acid. h Synthesis of other organoazides. General reaction conditions: Fe(OTf)₂ (5 mol%), 1 (0.5 mmol), 2 (0.65–1.0 mmol), TMSN₃ (1.0 mmol), TBPB (1.0 mmol) in DME (2 mL) at rt under an N₂ atmosphere. Isolated yields. dr values were determined by ¹H NMR