The regio-and chemo-selective Pd-catalyzed C-H activation methods have been successfully reported for directed C-H sulfonation and halogenation of pyridazinedione with arylsulfonyl chlorides and N-halosuccinimide, respectively. These [a]

An efficient and straightforward protocol for the regioselective acyloxylation of N-arylarbamates via Pd-catalyzed CÀ H bond functionalization has been demonstrated. The aliphatic and benzoic acid derivatives were used as the acyloxyl source to convert aromatic sp 2 CÀ H bonds into CÀ O bonds. Additionally, the oxidative homocoupling of N-arylarbamates were evaluated and gave the corresponding homocoupled products in good yields.