Direct access to heterocyclic scaffolds by new multicomponent Ugi-smiles couplings

New heterocyclic scaffolds can be easily prepared by the coupling of heteroaromatic phenols (pyridines, pyrimidines) with carbonyl compounds, amines, and isocyanides. This transformation related to the Ugi reaction probably involves a Smiles rearrangement. The scope of this methodology is further extended by the successful use of heterocyclic thiols to form highly functionalized thioamides.