Refinement of the Catalyst Backbone of Chiral Intramolecular Silicon–Sulfur Lewis Pairs: Improved Enantioselectivity in the Diels–Alder Reaction of Cyclohexa‐1,3‐diene and Chalcone Derivatives
Refinement of the Catalyst Backbone of Chiral Intramolecular Silicon–Sulfur Lewis Pairs: Improved Enantioselectivity in the Diels–Alder Reaction of Cyclohexa‐1,3‐diene and Chalcone Derivatives
复制标题
手性分子内硅-硫路易斯对催化剂主链的精制:提高环己-1,3-二烯和查尔酮衍生物的第尔斯-阿尔德反应中的对映选择性
DOI:
10.1002/ejoc.201800434
复制
发表时间:
2018
影响因子:
2.8
通讯作者:
M. Oestreich
中科院分区:
文献类型:
--
作者:
P. Shaykhutdinova;S. Kemper;M. Oestreich
The preparation and NMR spectroscopic characterization of a family of axial chiral, sulfur‐stabilized silicon cations is reported. These silicon Lewis acids have been applied as catalysts in difficult enantioselective Diels–Alder reactions of cyclohexa‐1,3‐diene and representative chalcone derivatives. To gain better understanding of the relevant structural elements in these catalysts, their silepine backbone and the aryl thioether group have been systematically modified. These efforts have led to an improved catalyst that induces 53 %eefor chalcone and even 65 %eefor a more hindered derivative. These cyclohexa‐1,3‐diene Diels–Alder reactions areendoselective. However, the corresponding cyclopentadiene Diels–Alder reactions predominantly yield theexocycloadducts with no enantioinduction.
登录
查看更多内容
影响因子:
15
作者:
Lam, Yu-hong;Cheong, Paul Ha-Yeon;Mata, Jose M. Blasco;Stanway, Steven J.;Gouverneur, Veronique;Houk, K. N.
通讯作者:
Houk, K. N.
影响因子:
2.8
作者:
P. Shaykhutdinova;M. Oestreich
通讯作者:
M. Oestreich
影响因子:
--
作者:
Ruth K. Schmidt;H. Klare;R. Fröhlich;M. Oestreich
通讯作者:
M. Oestreich
影响因子:
2.1
作者:
Karthikeyan, M;Kamakshi, R;Reddy, BSR
通讯作者:
Reddy, BSR
影响因子:
15
作者:
Ruth K. Schmidt;Kristine Muether;Christian Mück‐Lichtenfeld;S. Grimme;M. Oestreich
通讯作者:
Ruth K. Schmidt;Kristine Muether;Christian Mück‐Lichtenfeld;S. Grimme;M. Oestreich