D-缬氨醇 反应生成(R)-(+)-2-[2-(二苯基膦)苯基]-4-异丙基二恶唑
参考文献:In Situ Enzymatic Screening (Ises) Of P,N-Ligands For Ni(0)-Mediated Asymmetric Intramolecular Allylic Amination
标题:In Situ Enzymatic Screening (Ises) Of P,N-Ligands For Ni(0)-Mediated Asymmetric Intramolecular Allylic Amination
摘要:An In Situ Enzymatic Screening (Ises) Approach To Rapid Catalyst Evaluation Recently Pointed To Ni(0) As A New Candidate Transition Metal For Intramolecular Allylic Amination. This Led To Further Exploration Of Chiral Bidentate Phosphine Ligands For Such Transformations. Herein,A Variety Of P,N-Ligands Are Examined For This Ni(0)-Chemistry,Using A Model Reaction Leading Into The Vinylglycinol Scaffold. On The One Hand,An N,N-Bis(2-Diphenylphosphinoethyl)Alkylamine ('Pnp') Ligand Proved To Be The Fastest Ligand Yet Seen For This Ni(0)-Transformation. On The Other,Phosphinooxazoline (Phox) Ligands Of The Pfaltz-Helmchen-Williams Variety Gave The Highest Enantioselectivities (Up To 51% Ee) Among P,N-Ligands Examined. (C) 2004 Elsevier Ltd. All Rights Reserved.
Doi:10.1016/j.Tetasy.2004.06.052