A one-pot catalyst/external oxidant/solvent-free cascade approach to pyrimidines via a 1,5-hydride transfer

A cascade 3-component reaction of 6-aminouracil, aldehyde and tetrahydroisoquinolines under heating in the absence of catalyst, external oxidant and solvent is performed. The reaction constructs a new pyrimidine ring by the functionalization of the C–H bond adjacent to nitrogen through a 1,5-hydride shift. No chromatographic techniques were required to purify the products.