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Original Articles

CHELATISIERTE ENOLATE VON α-PHOSPHONYLIERTEM ACETALDEHYD

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Pages 27-33 | Received 29 May 1990, Published online: 04 Oct 2006
 

Abstract

Es wird gezeigt, daβ mit Lithiumbutyl bei tiefen Temperaturen das Lithiumenolat 6 aus 2 zugänglich ist, während bei Normaltemperatur 2 mit LiBu oder Zinkacetat bevorzugt unter Aldolkondensation zu den Metall-Komplexen des doppelt phosphonylierten Butadienolats oder dem freien E-Enol 8 reagieren. Die Verbindungen werden NMR-spektroskopisch charakterisiert. Einmal gebildetes Li-Enolat 6 ist stabil und zeigt einen selektiven HID-Austausch.

It is demonstrated that the lithium enolate 6 is available from 2 with lithiumbutyl at reduced temperature, while the reaction of 2 with Li-butyl or zinc acetate at normal temperature preferably yields the metal-complexes of the doubly phosphonylated butadienolate or the free E-enol 8 via aldolkondensation. The compounds are characterized by nmr-spectroscopy. Once formed Li-enolate 6 is stable and shows a selective H/D-exchange.

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