Chemistry Letters, Vol.36, No.1, 24-25, 2007
Low-valent niobium-mediated synthesis of indenes: Intramolecular coupling reaction of CF3 group with alkene C-H bond
CF3 group of o-alkenyl-alpha,alpha,alpha-trifluorotoluenes underwent intramolecular coupling reaction with the alkene C-H bond under NbCl5/LiAlH4 system. Substituted indenes were obtained in good yields.