title: Palladium-catalyzed [2+1+1] annulation of norbornenes with (Z)-bromostyrenes: synthesis of bismethylenecyclobutanes via twofold C(sp(2))-H bond activation.
abstract: The first Pd-catalyzed intermolecular [2+1+1] annulation reaction of (Z)-bromostyrene derivatives and norbornenes has been realized. Bismethylenecyclobutane derivatives were obtained with high yields. The domino coupling reaction involves a double Heck-type coupling process, twofold C(sp(2))-H bond activation and formation of three carbon-carbon bonds.
authors.affiliation: Department of Chemistry, Zhejiang University (Xixi Campus), Hangzhou 310028, People's Republic of China. wlbao@zju.edu.cn.
authors.forename: Jiangang
authors.initials: J
authors.lastname: Mao
authors.forename: Weiliang
authors.initials: W
authors.lastname: Bao