Palladium-catalysed regio- and stereoselective arylative substitution of γ,δ-epoxy-α,β-unsaturated esters and amides by sodium tetraaryl borates
作者:Yasemin Bilgi、Melih Kuş、Levent Artok
DOI:10.1039/d0ob01226b
日期:——
Palladium-catalysed reactions of γ,δ-epoxy-α,β-unsaturated esters and amides with NaBAr4 reagents proceeded regio- and stereoselectively, producing allylic homoallyl alcohols with aryl-substituents in the allylic position for a wide range of substrates. AsPh3 was found to be a competent ligand for the arylation reaction, whereas phosphine ligand/Lewis acidic organoboron combinations favoured the substitution
钯催化的 γ,δ-环氧-α,β-不饱和酯和酰胺与 NaBAr 4试剂的反应以区域选择性和立体选择性进行,产生在烯丙基位置具有芳基取代基的烯丙基高烯丙基醇,适用于各种底物。AsPh 3被发现是芳基化反应的有效配体,而膦配体/Lewis 酸性有机硼组合有利于氧亲核试剂(例如H 2 O、ROH)的取代反应。