Synthesis of 1,3‐Bis‐(boryl)alkanes through Boronic Ester Induced Consecutive Double 1,2‐Migration
作者:Cai You、Armido Studer
DOI:10.1002/anie.202007541
日期:2020.9.21
approach for the preparation of 1,3‐bis‐(boryl)alkanes is introduced. It is shown that readily generated vinylboron ate complexes react with commercially available ICH2Bpin to valuable 1,3‐bis‐(boryl)alkanes. The introduced transformation, which is experimentally easy to conduct, shows broad substrate scope and high functional‐group tolerance. Mechanistic studies reveal that the reaction does not proceed
Palladium-catalyzed Suzuki-type couplings of 3-pyridyl triflates with alkenylpinacol boronates proceed in good to excellent yields. Optimized conditions use Pd(PPh3)4 (10 mol%) as catalyst with K3PO4 (3 equiv) as base in 1,4-dioxane.