Effects of Extended Aryl-Substituted Bisoxazoline Ligands in Asymmetric Synthesis - Efficient Synthesis and Application of 4,4′-Bis(1-Naphthyl)-, 4,4′-Bis(2-Naphthyl)- and 4,4′-Bis(9-Anthryl)-2,2′-isopropylidenebis(1,3-oxazolines)
作者:Hester L. van Lingen、Floris L. van Delft、Roy P. M. Storcken、Koen F. W. Hekking、Anouk Klaassen、Jan J. M. Smits、Patrycja Ruskowska、Jadwiga Frelek、Floris P. J. T. Rutjes
DOI:10.1002/ejoc.200500566
日期:2005.12
The steric influence of extended aryl substituents on 2,2′-bis(1,3-oxazoline) ligands was investigated in a series of asymmetric catalytic reactions such as Mukaiyama aldol and Michael reactions, hetero-Diels–Alder processes, and allylic alkylation reactions. 4,4′-(2-Naphthyl)- and 4,4′-(9-anthryl)-substituted isopropylidene-bridged 2,2′-bis(1,3-oxazolines) were synthesized and their enantioselective
在一系列不对称催化反应中研究了扩展芳基取代基对 2,2'-双(1,3-恶唑啉)配体的空间影响,如 Mukaiyama 醛醇和迈克尔反应、杂-Diels-Alder 过程和烯丙基烷基化反应. 合成了 4,4'-(2-萘基)-和 4,4'-(9-蒽基)-取代的异亚丙基桥连 2,2'-双 (1,3-恶唑啉) 及其对映选择性和催化性能用不同的金属进行评估。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)