Reactions of alkoxymethyl substitutedstyrene derivatives with a stoichiometric and/or catalytic amount of zirconocene-(1-butene) complex (“Cp2Zr“) causes an unexpected zirconocene insertion into benzylic position and/or homolytic coupling reaction of the styrene derivatives.
Zirconocene-Mediated and/or Catalyzed Unprecedented Coupling Reactions of Alkoxymethyl-Substituted Styrene Derivatives
作者:Yutaka Ikeuchi、Takeo Taguchi、Yuji Hanzawa
DOI:10.1021/jo0502293
日期:2005.5.1
through an aromatic conjugate system giving metalated o-quinodimethane species, and (iii) transfer of zirconium metal to the benzylic position. Through use of a catalytic amount of “Cp2Zr”, however, unprecedented homo-coupling reactions (dimerization) of o-(alkoxymethyl)styrene derivatives occurred to give a tetracyclic compound. On the other hand, reactions of o-(1-alkoxyisopropyl)styrene derivatives