Ytterbium Triflate: A Highly Active Catalyst for Addition of Amines to Carbodiimides to <i>N</i>,<i>N</i>′,<i>N</i>′′-Trisubstituted Guanidines

Abstract

Ytterbium triflate was found to be efficient catalyst for addition of amines to carbodiimides to N,N′,N′′-trisubstituted guanidines with a wide scope of amines under solvent-free condition