Room temperature Ni-catalyzed reduction of aryl tosylates by borane hydrides
摘要:
Mild Ni-catalyzed homogeneous reductions of aryl tosylates are described for the first time. The catalytic system Ni(PPh3)(2)Cl-2 and PCy3 is shown to be general for hydrogenolysis of a wide range of tosylates, including hindered, deactivated, heterocyclic, and bifunctional examples. (c) 2006 Elsevier Ltd. All rights reserved.
Three-Component Bisannulation for the Synthesis of Trifluoromethylated Tetracyclic <i>Aza</i>-Aromatics through Six C(sp<sup>3</sup>)–F Bond Cleavage and Four C–N Bond Formation
unprecedented and expeditious tandem bisannulation of polyfluoroalkylated tetralones with benzamidines to access various fluoroalkyl tetracyclic [1,3]-diazepines through multiple C–N bondformation and C(sp3)–F bond cleavage is reported. The process features high regio-/chemoselectivities, broad substrate scope, good functional group tolerance, procedural simplicity, mild reaction conditions, and scale-up