Synthesis of α-Azido Ketones and Esters Using Recyclable Hypervalent Iodine Reagent

A simple and mild method for the preparation of α-azido ketones and esters using hypervalent iodine reagent, 4,4′-bis-(dichloroiodo)-biphenyl, and sodium azide in 1,4-dioxane is discussed. Advantages of this system are easy workup, recyclable reagent, and moderate to good yields.