A metal-free synthesis of pyrimidines from amidines with α,β-unsaturated ketonesviatandem [3 + 3] annulation and visible-light-enabled photo-oxidation

A facile synthesis of pyrimidines from amidines and α,β-unsaturated ketones, involving a [3 + 3] annulation followed by visible light photo-oxidation using air as terminal oxidant, is reported.