Enantioselective Allylic Amination of Trifluoromethyl Group Substituted Racemic and Unsymmetrical 1,3-Disubstituted Allylic Esters by Palladium Catalysts
The palladium-catalyzed regio- and enantioselective allylic amination of trifluoromethyl group substituted racemic and unsymmetrical 1,3-disubstituted allylic esters has been accomplished. The enantioselective formation of the α-type allylic amines was attained by the dynamickineticasymmetrictransformation (DYKAT).
We succeeded in the regioselective synthesis of chiral trifluoromethyl group substituted allylic amines from chiral allyl acetate using two types of palladium catalysts. Furthermore, we found that the kinetic resolution had occurred during the isomerization step from the γ-type product to the α-type product by the [Pd(C 3 H 5 )(cod)]BF 4 /(S)-BINAP catalyst.
我们使用两种钯催化剂成功地从手性乙酸烯丙酯区域选择性合成了手性三氟甲基取代的烯丙胺。此外,我们发现在[Pd(C 3 H 5 )(cod)]BF 4 /(S)-BINAP 催化剂从γ 型产物到α 型产物的异构化步骤中发生了动力学拆分。