Chemoselective palladium-catalyzed α-allylation of α-boryl aldehydes
作者:Jeffrey D. St. Denis、Zhi He、Andrei K. Yudin
DOI:10.1039/c2ob26503f
日期:——
Herein we report the development of an α-allylation reaction of α-boryl aldehydes that preserves the carbonâboron bond under Pd0/PdII catalysis. A variety of α-boryl aldehydes and allylic alcohols participate in this chemoselective transformation. The α-allylated products were obtained as single regioisomers.
Boroalkyl Group Migration Provides a Versatile Entry into α-Aminoboronic Acid Derivatives
作者:Zhi He、Adam Zajdlik、Jeffrey D. St. Denis、Naila Assem、Andrei K. Yudin
DOI:10.1021/ja304173d
日期:2012.6.20
exemplifying migration of boron-substituted carbon is described. We show that α-boroalkyl groups of transient boroalkyl acyl azide intermediates readily migrate from carbon to nitrogen. This process allows access to a new class of stable molecules, α-boryl isocyanates, from α-borylcarboxylic acid precursors. The methodology facilitates synthesis of a wide range of α-aminoboronic acid derivatives, including