Rh/Cu‐Cocatalyzed Cascade Cyclization Between Azidobenzamides and Diazopyrazolones for Synthesis of Spiroquinazolinones

Abstract Cocatalyzed by Rh 2 (Oct) 4 (10 mol%)/CuI (10 mol%) and BINAP (20 mol%) in 1,2‐dichloroethane at 80 °C, the cascade cyclization between azidobenzamides and diazopyrazolones underwent readily and furnished spiroquinazolinones in reasonable chemical yields. The chemical structure of one compound has been confirmed by X‐ray diffraction analysis, and the others are suggested by inference.