Due to their important potential medicinal value, chemists
are
pursuing mild and efficient methods to synthesize structurally diverse
quinazolinone derivatives. In this paper, a series of isocyano-tethered N-aryl quinazolinones were designed and synthesized to conduct
electrocatalytic radical cascade cyclization reactions with phosphine
oxides by utilizing inexpensive MnII salt as the catalyst.
The desired 6-phosphorylated quinoxalino[2,1-b]quinazolin-12-ones
were obtained in moderate to good yields.