The Pd(II)-catalyzedC–Hbond activation/C–Nbond cleavage annulation reaction of N-alkyoxyamide aryne is developed to synthesize 9,10-dihydrophenanthrenone derivatives. This reaction exhibited good functional group compatibility with yields up to 92%. Detailed mechanistic studies showed that the key to C–Nbond cleavage is the formed eight-membered palladacycle intermediate undergoing nucleophilic
Copper(I)-catalyzed N–O bondformation reactions through vinyl nitrene-mediated pathway were described. The reactions of N-alkoxylbenzamides and 2H-azirines afforded α-amino oxime ethers in good to excellent yields at room temperature, which involved the cleavage of C–N and N–O bonds and the construction of new N–O and C–N bonds. It offers an efficient, regio- and stereoselective synthetic route for
the synthesis of valuable compounds with direct applicability to oxindole alkaloids and antibacterial agents. Despite recent advances in organic chemistry and the growing number of reported methods for synthesizing benzolactams, their preparation still requires a multistep process. C–H amination reactions can convert aromatic C(sp2)–H bonds directly to C(sp2)–N bonds, and this direct approach to C–N