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Original Articles

PHOSPHORORGANISCHE VERBINDUNGEN 951: Beschleunigte Hydrolyse von Organophosphorverbindungen durch Phasentransferkatalyse und H2O2 als Supernucleophil

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Pages 339-348 | Received 18 May 1981, Published online: 19 Dec 2006
 

Abstract

Am Beispiel des Phenylphosphonsäurebutylesterfluorids 1 bzw. des Di-isopropylfluorphosphats als Repräsentaten physiologisch aktiver Organophosphorverbindungen wird der Einfluß von pH, der Struktur des Phasentransfer-Katalysators, der Art der organischen Phase und von HO2 als Supernucleophil auf die alkalische Hydrolyse unter PT-Bedingungen untersucht. Im Vergleich zum unkatalysierten System wird die Hydrolyse von 1 um den Faktor ∼550 (Toluol) bzw. ∼520 (Tetrachlorethylen) beschleunigt. Dies bedeutet: die Verbindung 1 wird unter optimalen Bedingungen bereits innerhalb von drei (Toluol) bzw. einer Minute (Tetrachlorethylen) total hydrolysiert.

The alkaline hydrolyses of the physiologically active phosphor compounds: butyl-phenylfluorophosphonate 1 and di-isopropyl-fluorophosphate were studied under phase-transfer (PT) conditions. The influence of pH, the structure of the phase-transfer catalyst, the nature of the organic phase and the use of the supernucleophile HO2 on the hydrolysis was investigated. The hydrolysis of 1 is accelerated by a factor of ∼550 (toluene) resp. ∼520 (tetrachloroethylene) compared with the uncatalysed reaction. In concrete terms, the compound 1 can be completely hydrolysed in three (toluene) resp. in one minute (tetrachloroethylene) under optimal conditions.

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