Herein α-bromoacrylic acids have been employed as C1 insertion units to achieve the palladium-catalyzed [4 + 1] annulation of 2-iodobiphenyls, which provides an efficient platform for the construction of diverse dibenzofulvenes. This protocol enables the formation of double C­(aryl)–C­(vinyl) bonds via a C­(vinyl)–Br bond cleavage and decarboxylation. It is particularly noteworthy that the method features a broad substrate scope, and various interesting frameworks, such as bridged ring, fused (hetero)­aromatic ring, and divinylbenzene, can be successfully incorporated into the products.

Transition-metal-catalysed C-H functionalization has emerged as a powerful approach for the transformation of organic molecules due to its high atom- and step economy. Among them, palladium-catalysed intermolecular C-H annulation of...

Herein a novel palladium-catalyzed tandem decarboxylative biscyclization of o-alkynylanilines with o-chlorobenzoic acids has been reported, which provides an efficient approach for the assembly of dibenzo[a,c]carbazoles. This protocol employs an intramolecular...