Enantiomerically Pure P,N Chelates Based on Phospholene Rings: Palladium Complexes and Catalytic Applications in Allylic Substitution
作者:François Leca、Fernando Fernández、Guillermo Muller、Christophe Lescop、Régis Réau、Montserrat Gómez
DOI:10.1002/ejic.200900892
日期:2009.12
The synthesis of optically pure 2-pyridylphospholene ligands by diastereomeric resolution of PdII complexes, bearing the corresponding racemic P,N ligand and (R)-α-methylbenzylamine, by means of fractional crystallisation is described. A full coordination study of palladium complexes containing 2-pyridylphospholene and the corresponding phosphole ligands, both in solution (by means of NMR spectroscopy)
描述了通过 PdII 配合物的非对映异构拆分合成光学纯的 2-吡啶基磷烯配体, 带有相应的外消旋 P,N 配体和 (R)-α-甲基苄胺, 通过分步结晶。进行了包含 2-吡啶基磷烯和相应磷光体配体的钯配合物在溶液中(通过 NMR 光谱)和固态(通过 X 射线衍射)的完整配位研究。这些配体在 Pd 催化的外消旋底物(rac-3-acetoxy-1,3-diphenyl-1-propene 和 rac-3-acetoxy-1-cyclohexene)和 (E)-3-acetoxy-1 的烯丙基取代中进行了评估-苯基-1-丙烯。对钯烯丙基中间体进行了建模研究,以证明用 2-吡啶基磷烯配体观察到的不对称诱导是正确的。 (© Wiley-VCH Verlag GmbH &