Enantioselective synthesis of 2,5-dihydrobenzo[b]azepine derivatives via iridium-catalyzed asymmetric allylic amination with 2-allylanilines and ring-closing-metathesis reaction
作者:Ke-Yin Ye、Li-Xin Dai、Shu-Li You
DOI:10.1039/c2ob00036a
日期:——
Iridium-catalyzed asymmetric allylic amination of allylic carbonates with 2-allylanilines was realized. With a catalyst generated from 2 mol% of [Ir(dbcot)Cl]2 (dbcot = dibenzo[a,e]cyclooctatetraene) and 4 mol% of phosphoramidite ligand (L3), the amination products were obtained in up to 99% yield and 99% ee. Subjecting amination products to trifluoroacetyl protection and ring-closing-metathesis reaction
实现了铱催化的2-烯丙胺与碳酸烯丙酯的不对称烯丙基胺化反应。使用由2 mol%的[Ir(dbcot)Cl] 2(dbcot =二苯并[ a,e ]环辛酸酯)和4 mol%的亚磷酰胺配体(L3)生成的催化剂,可获得高达99%的收率的胺化产物。和99%ee。使胺化产物经受三氟乙酰基保护和闭环复分解反应提供了对映体富集的2,5-二氢苯并[ b ]氮杂卓衍生物的有效合成。