An innovative synthesis of tertiary hydroxyl thieno[2,3-d]pyrimidinone skeleton: Natural-like product from the tandem reaction of o-aminothienonitrile and carbonyl compound

A straightforward base accelerant tandem protocol for the synthesis of the tertiary hydroxyl natural-like thieno[2,3-d]pyrimidinone skeleton was developed from the cyclocondensation of o-aminothienonitrile and carbonyl compound. The reaction process includes PDF conversion and photo-catalytic oxygenation. This synthetic strategy offers an alternative method for regioselective construction of tertiary hydroxylated thieno[2,3-d]pyrimidinone architectures with kinetic, thermodynamic control, and six-member ring effect.