The palladium-catalyzed asymmetric allylicalkylation of indoles with 1,3-diphenyl-2-propenyl acetate using P/N-type ligands such as N-aryl indole, C–N bond axially chiral aminophosphine (aS)-L4, gave the desired products 1 in good yields and with moderate to high enantioselectivities (up to 90% ee).
We synthesized cinnamoyl amide type chiral P,olefin ligand (S)-4. We successfully obtained separable diastereomers of 4d and demonstrated Pd-catalyzed asymmetric allylic substitution reactions of indoles using (S,aS)-4d as a chiral ligand with high enantioselectivities (up to 98% ee).
我们合成了肉桂酰胺型手性P,烯烃配体( S ) -4。我们成功地获得了4d的可分离非对映异构体,并证明了使用 ( S , aS ) -4d作为具有高对映选择性(高达 98% ee)的手性配体的Pd 催化的吲哚不对称烯丙基取代反应。
Palladium‐Catalyzed Enantioselective Indole Allylic Alkylation with Chiral Phosphoramidite‐Selenide‐Based Ligands
作者:Bin Feng、Yun‐Fan Zhang、Shan Li、Ge‐Yun You、Jun Xuan
DOI:10.1002/ejoc.202300861
日期:2024.1.8
A convenient Pd-catalyzed allylicalkylation of indoles was developed using a P−Se ligand, and the scope of the reaction was demonstrated with various substituted indoles. The corresponding products were obtained in good to excellent yields (up to 95 %) and up to 99 % ee.
使用 P−Se 配体开发了一种方便的 Pd 催化吲哚烯丙基烷基化,并用各种取代的吲哚证明了该反应的范围。相应的产物以良好到优异的收率(高达 95%)和高达 99% ee 获得。