Pd(OAc)2-catalyzed one-pot preparation of anthranilates from acyclic unsaturated β-enamino esters

Abstract

A one-pot synthesis of anthranilates from acyclic unsaturated β-enamino esters with a catalytic amount of Pd(OAc)2 was achieved for the first time. The substrates for the key catalytic reaction were easily prepared from acetoacetate esters and amines, and functionalized anthranilates were obtained in moderate to good chemical yields. A simple assembly of a 13C-labeled anthranilate was demonstrated by applying this protocol. In addition, bioactive NNI-5 was synthesized using this catalytic process.