Transition-metal-free azide insertion of N-triftosylhydrazones using a non-metallic azide source†
Swastik
Karmakar, 
c
Zhaohong
Liu
*a
c
Zhaohong
Liu
*a
Abstract
Benzylic azides, an important class of active organic synthons, were synthesized in high yields from the easily accessible N-triftosylhydrazones with stable TMSN3 under mild conditions. The reaction features high efficiency and excellent functional group tolerance, as illustrated by gram-scale synthesis and the synthesis of drug-like molecules. Mechanistic studies reveal that azidation occurs at the electron-deficient diazo-carbon via the elimination of N2 by an azide ion.
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