Highly Selective Allylborations of Aldehydes Using α,α-Disubstituted Allylic Pinacol Boronic Esters
作者:Matthew J. Hesse、Stéphanie Essafi、Charlotte G. Watson、Jeremy N. Harvey、David Hirst、Christine L. Willis、Varinder K. Aggarwal
DOI:10.1002/anie.201402995
日期:2014.6.10
α‐Disubstituted allylic pinacol boronic esters undergo highly selective allylborations of aldehydes to give tetrasubstituted homoallylic alcohols with exceptional levels of anti‐Z‐selectivity (>20:1). The scope of the reaction includes both acyclic and cyclic allylic boronic esters which lead to acyclic and exocyclic tetrasubstituted homoallylic alcohols. The use of β‐borylated allylic boronic esters gave fully