title: A ligand-controlled switch of regioselectivity in ring-opening coupling of diarylmethylenecyclopropa[b]naphthalenes with Grignard reagents.
abstract: A ligand-controlled regioselectivity switch of ring-opening coupling reaction of diarylmethylenecyclopropa[b]naphthalenes with Grignard reagents providing differently substituted β-vinylic naphthalenes in moderate to excellent yields was reported: when Pd(OAc)2 was used, the aromatic group from the Grignard reagent regioselectively coupled to the naphthyl ring after the ring-opening of three-membered cycle, which is different from the Pd(PPh3)2Cl2-catalyzed reaction. Based on a careful NMR study, we concluded that it may be explained by the ligand effect.
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China. wululing@zju.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Cao
authors.forename: Xian
authors.initials: X
authors.lastname: Huang
authors.forename: Luling
authors.initials: L
authors.lastname: Wu