A route to stereochemically pure benzyllithium reagents by stereocontrolled epimerisation.
A route to stereochemically pure benzyllithium reagents by stereocontrolled epimerisation.
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通过立体控制差向异构化获得立体化学纯的苄基锂试剂的途径
DOI:
10.1002/chem.201405152
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
C. Strohmann
中科院分区:
文献类型:
--
作者:
S.G. Koller;U. Kroesen;C. Strohmann
Alkyllithium compounds are not generally stable at room temperature, therefore strategies were established to overcome this limitation. We present a systematic approach to obtain a stereochemically enriched benzyllithium compound, starting with the simple addition of a chiral auxiliary and ending by incorporation of the auxiliary in the substrate. Thereby, a very unusual dimer of a lithiated benzylsilane was obtained, which could be split into stereochemically enriched monomers by the addition of Lewis bases. Furthermore, we were able to understand the factors responsible for this stereochemical enrichment by using quantum chemical calculations and clarify the configuration of the lithiated compound and the corresponding trapping product by crystallisation. This enabled us to determine the stereochemical course of the deprotonation and the subsequent metathesis reaction.
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DOI:
10.1002/recl.19861050102
发表时间:
1986
期刊:
Recueil des Travaux Chimiques des Pays-Bas
影响因子:
--
作者:
G. W. Klumpp
通讯作者:
G. W. Klumpp
影响因子:
--
作者:
D. Hoppe;T. Hense
通讯作者:
T. Hense
DOI:
10.1002/cber.19921250730
发表时间:
1992-07-01
期刊:
CHEMISCHE BERICHTE-RECUEIL
影响因子:
--
作者:
AHLBRECHT, H;HARBACH, J;KALINOWSKI, HO
通讯作者:
KALINOWSKI, HO
影响因子:
2.8
作者:
C. Strohmann;Klaus Lehmen;K. Wild;Daniel Schildbach
通讯作者:
Daniel Schildbach
影响因子:
--
作者:
Carsten Strohmann;B. Abele;Klaus Lehmen;Daniel Schildbach
通讯作者:
Daniel Schildbach