Enantioselective Diels–Alder Reactions of Cyclohexa-1,3-diene and Chalcones Catalyzed by Intramolecular Silicon–Sulfur Lewis Pairs as Chiral Lewis Acids
Enantioselective Diels–Alder Reactions of Cyclohexa-1,3-diene and Chalcones Catalyzed by Intramolecular Silicon–Sulfur Lewis Pairs as Chiral Lewis Acids
复制标题
手性路易斯酸分子内硅硫路易斯对催化环己-1,3-二烯和查尔酮的对映选择性 DielsâAlder 反应
DOI:
10.1021/acs.organomet.6b00548
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发表时间:
2016
期刊:
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;M. Oestreich
The stereoselective preparation of diastereomeric dihydrosilepine-derived silicon cations decorated with another binaphthyl unit at the silicon atom is described. A sulfide donor attached to that additional binaphthyl substituent forms an intramolecular Lewis pair with the electron-deficient silicon atom, as verified by29Si NMR spectroscopy. Both chiral sulfur-stabilized silicon cations act as catalysts in the difficult Diels–Alder reaction of cyclohexa-1,3-diene and chalcone derivatives. Both Lewis acids induce enantioselectivity, but theS,Srelative configuration is superior to theS,Rconfiguration. With the former diastereomer, enantiomeric excesses of close to 60% are obtained. These values are the highest achieved to date in this seemingly trivial cycloaddition.
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DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
Yuhki Iwade;Tetsuo Kurata;Tatsuya minami;Yasuo Hatanaka
通讯作者:
Yasuo Hatanaka
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:
15
作者:
Johannsen, M;Jorgensen, KA;Helmchen, G
通讯作者:
Helmchen, G
影响因子:
4.6
作者:
M. Reißmann;A. Schäfer;R. Panisch;M. Schmidtmann;M. Bolte;T. Müller
通讯作者:
T. Müller
影响因子:
2.1
作者:
Karthikeyan, M;Kamakshi, R;Reddy, BSR
通讯作者:
Reddy, BSR