New 2-azanorbornyl derivatives: chiral (N,N)-donating ligands for asymmetric catalysis
摘要:
New chiral 2-azanorbornane derivatives were prepared and used as (N,N)-donating ligands in a copper-catalyzed Henry reaction yielding up to 62% ee. (C) 2010 Elsevier Ltd. All rights reserved.
New 2-azanorbornyl derivatives: chiral (N,N)-donating ligands for asymmetric catalysis
摘要:
New chiral 2-azanorbornane derivatives were prepared and used as (N,N)-donating ligands in a copper-catalyzed Henry reaction yielding up to 62% ee. (C) 2010 Elsevier Ltd. All rights reserved.
Chiral scaffolds of 2-azabicyclo[2.2.1]heptane and 2-azabicyclo[3.2.1]octane were used for the construction of new modular catalysts containing complexing moieties pyridine, 2,2′-bipyridine and 1,10-phenanthroline appended by an imine linkage. The coordination abilities of the new ligands towards Zn(II) were investigated using NMR and UV spectroscopy. The plausible structures of the [ZnL2]2+ and [ZnLXn](2−n)+
2-氮杂双环[2.2.1]庚烷和2-氮杂双环[3.2.1]辛烷的手性支架用于构建新的模块催化剂,该催化剂包含配位吡啶,2,2'-联吡啶和1,10-菲咯啉亚胺键。利用NMR和UV光谱研究了新配体对Zn(II)的配位能力。通过比较实验和DFT计算的NMR光谱,可以确定形成的[ZnL 2 ] 2+和[ZnLX n ] (2- n)+配合物的合理结构。[ZnLX n ] (2- n)+的催化应用在与芳族醛酮的不对称醛醇缩合反应型复合物所产生的过量的相应的顺式中高达> 98%ee的-aldols。
New 2-azanorbornyl derivatives: chiral (N,N)-donating ligands for asymmetric catalysis
作者:Elżbieta Wojaczyńska
DOI:10.1016/j.tetasy.2010.12.011
日期:2011.1
New chiral 2-azanorbornane derivatives were prepared and used as (N,N)-donating ligands in a copper-catalyzed Henry reaction yielding up to 62% ee. (C) 2010 Elsevier Ltd. All rights reserved.