catalytic system for tandem Pd-catalyzed carbonylation and C-C cross-coupling via C-H activation was designed. The proposed cascade reaction allows a facile one-step construction of a tetracyclic isoindoloindole skeleton, in which three new C-C/C-N bonds are simultaneously formed. In detail, the carbonylation of aryl dibromides with indoles and C-H activation of in situ formed N-(2'-bromoaroyl)-indole provide
Arynes are generated cleanly and rapidly by halogen-lithium exchange of ortho-haloaryl triflates with n-BuLi at -78-degrees-C. [2+4]-Cycloaddition of alpha-alkoxyaryne with 2-methoxyfuran proceeded regioselectively (head-to-head) to afford 1,4,5-naphthalenetriols.