Method for the Synthesis of Dibenzo[g,p]Chrysenes: Domino Friedel–Crafts-Type Cyclization of Difluoroethenes Bearing Two Biaryl Groups
摘要:
Dibenzo[g,p]chrysenes were readily synthesized via the superacid- or TiF4-mediated domino Friedel-Crafts-type cyclization of 1,1-difluoroethenes bearing two biaryl groups, which were easily prepared via the Suzuki-Miyaura coupling of 1,1-difluoro-2,2-diiodoethene or 1-(biphenyl-2-yl)-1-bromo-2,2-difluoroethene. Using this approach, the activation of both vinylic and aromatic C-F bonds was successfully achieved to make new C-C bonds.
InCl<sub>3</sub>-Catalyzed Synthesis of 1,2-Dimetallic Compounds by Direct Insertion of Aluminum or Zinc Powder
作者:Tobias D. Blümke、Thomas Klatt、Konrad Koszinowski、Paul Knochel
DOI:10.1002/anie.201205169
日期:2012.9.24
In‐sertion of metal: Catalytic amounts of InCl3 allow the insertion of aluminum and zinc into aromatic 1,2‐dibromides or 1,2‐bromotriflates (see scheme). These 1,2‐dimetallic species can undergo Cu or Pd‐catalyzed acylations, allylations, or cross‐couplings.