A novel route to imidoylbenzotriazoles and their application for the synthesis of enaminones

J Org Chem. 2004 Jul 23;69(15):5108-11. doi: 10.1021/jo0496594.

Abstract

Reactions of secondary amides 2a-i with 1-chloro-1H-benzotriazole and triphenylphosphine give imidoylbenzotriazoles 3a-i. The treatment of 3a,b,e,g with silyl enol ethers 5a,b in the presence of potassium tert-butoxide provides a new general approach to enaminoketones 6a-h.