Abstract
An efficient method has been described for the one pot synthesis of acyl azides from corresponding carboxylic acids and sodium azide utilizing phosphonitrilic chloride trimer (Cl6N3P3) in combination with NMM under extremely mild conditions. A variety of carboxylic acids has been converted to azides in good to excellent yields. Aromatic carboxylic acids as well as aliphatic and unsaturated carboxylic acids have been smoothly converted into corresponding acyl azides without Curtius rearrangement to an isocyanate.
