9-Stannafluorenes: 1,4-Dimetal Equivalents for Aromatic Annulation by Double Cross-Coupling
作者:Ikuhiro Nagao、Masaki Shimizu、Tamejiro Hiyama
DOI:10.1002/anie.200903779
日期:2009.9.28
Double or nothing! A straightforward and high‐yielding approach to a variety of polycyclic aromatic hydrocarbons has been achieved through palladium‐catalyzed annulation of 9,9‐dimethyl‐9‐stannafluorenes and dithienostannole with 1,2‐dihaloarenes (see scheme). In addition, 1,1‐dibromo‐1‐alkenes can also be applied to this annulation to produce dibenzofulvenes in excellent yields.