Divergent Reactivity of Alkyl Aryl Sulfones with Bases: Selective Functionalization of<i>ortho</i>-Aryl and α-Alkyl Units Enabled by a Unique Carbanion Transmetalation
作者:Lucie Řehová、Ivana Císařová、Ullrich Jahn
DOI:10.1002/ejoc.201301553
日期:2014.3
metalation selectivity of branched alkylarylsulfones is described. Such sulfones were found to initially undergo directed ortho-metalation with good regioselectivity, despite having a more acidic α-H atom. The structure of the alkylunit profoundly, but predictably, influences the regioselectivity of the attack of the base. In β- and γ-branched ortho-(alkylsulfonyl)aryllithiums a transmetalation to the