ansa-metallocene derivatives : XII. Diastereomeric derivatisation and enantiomer separation of ethylenebis(tetrahydronindenyl)-titanium and -zirconium dichlorides
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1987
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Journal of Organometallic Chemistry. 1987, 328(1-2), pp. 87-99. ISSN 0022-328X. Available under: doi: 10.1016/S0022-328X(00)99770-5
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Derivatisation of racemic ethylene-bridged bis(4,5,6,7tetrahydro-1-indenyl)-titanium and -zirconium dichlorides with O-acetyl-r-mandelic acid affords diastereomers which can be separately crystallised. Crystal and molecular structures of these diastereomers reveal different chelate ring conformations in the crystalline state. The separated diastereomers have been converted, via their dimethyl derivatives, into the corresponding titanocene and zirconocene dichloride enantiomers, the optical purity of these enantiomers has been demonstrated by their reconversion into the acetyl-r-mandelate derivatives.
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SCHÄFER, Andrea, Eberhard KARL, Laszlo ZSOLNAI, Gottfried HUTTNER, Hans-Herbert BRINTZINGER, 1987. ansa-metallocene derivatives : XII. Diastereomeric derivatisation and enantiomer separation of ethylenebis(tetrahydronindenyl)-titanium and -zirconium dichlorides. In: Journal of Organometallic Chemistry. 1987, 328(1-2), pp. 87-99. ISSN 0022-328X. Available under: doi: 10.1016/S0022-328X(00)99770-5BibTex
@article{Schafer1987ansam-24058,
year={1987},
doi={10.1016/S0022-328X(00)99770-5},
title={ansa-metallocene derivatives : XII. Diastereomeric derivatisation and enantiomer separation of ethylenebis(tetrahydronindenyl)-titanium and -zirconium dichlorides},
number={1-2},
volume={328},
issn={0022-328X},
journal={Journal of Organometallic Chemistry},
pages={87--99},
author={Schäfer, Andrea and Karl, Eberhard and Zsolnai, Laszlo and Huttner, Gottfried and Brintzinger, Hans-Herbert}
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<dcterms:abstract xml:lang="eng">Derivatisation of racemic ethylene-bridged bis(4,5,6,7tetrahydro-1-indenyl)-titanium and -zirconium dichlorides with O-acetyl-r-mandelic acid affords diastereomers which can be separately crystallised. Crystal and molecular structures of these diastereomers reveal different chelate ring conformations in the crystalline state. The separated diastereomers have been converted, via their dimethyl derivatives, into the corresponding titanocene and zirconocene dichloride enantiomers, the optical purity of these enantiomers has been demonstrated by their reconversion into the acetyl-r-mandelate derivatives.</dcterms:abstract>
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