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.
双倍或一无所有!通过钯催化的1,2-二卤代芳烃与9,9-二甲基-9-锡芴和二噻吩并环戊烷实现了直接,高产的多种多环芳烃方法。此外,还可以将1,1-二溴-1-烯用于该环合反应,以高收率生产二苯并富烯。