Mild Oxidative Cleavage of Borane−Amine Adducts from Amide Reductions:  Efficient Solution- and Solid-Phase Synthesis of <i>N</i>-Alkylamino Acids and Chiral Oligoamines

Mild Oxidative Cleavage of Borane−Amine Adducts from Amide Reductions:  Efficient Solution- and Solid-Phase Synthesis of <i>N</i>-Alkylamino Acids and Chiral Oligoamines