Preparation and Structure of Optically Active Imidazolium Tetrafluoroborates; in Search of New Chiral Ionic Liquids

• Autorzy: Mlostoń G. , Mucha P. , Tarka R. , Urbaniak K. , Linden A. , Heimgartner H.
• Języki publikacji: EN

Abstrakty

EN

Enantiomerically pure (R)-1-(1-phenylethyl)imidazoles 4a,b can be prepared conveniently from alfa-(hydroxyimino)ketones 1, (R)-1-phenylethylamine and form aldehyde, fol lowed by deoxygenation with Raney-Ni. Similarly, the reaction with (R,R)-trans-cyclohexane-1,2-diamine yields enantiomerically pure (R,R)-trans-1,1'-cyclohexane-1,2-diyl)imidazoles 4c,d. Alkylation of these imidazole derivatives with alkylbromides leads to the corresponding 3-alkylimidazolium bromides 6 and 8, respectively, which on treatment with sodium tetrafluoroborate are transformed into the correspond ing tetrafluoroborates 7 and 9. Whereas some of the imidazolium salts 7 show properties of chiral ionic liquids, the bis-imidazolium tetrafluoroborates 9 are high-melting crystalline materials.

Słowa kluczowe

EN

imidazole N-oxides; imidazolium salts; ionic liquids; X-ray crystallography

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2009
• Tom: Vol. 83, nr 6
• Strony: 1105--1114
• Opis fizyczny: Bibliogr. 22 poz., rys.

Twórcy

autor

Mlostoń G.

autor

Mucha P.

autor

Tarka R.

autor

Urbaniak K.

autor

Linden A.

autor

Heimgartner H.

• Department of Organic and Applied Chemistry, University of Łódź, Narutowicza 68, PL-90-136 Łódź, Poland,

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