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Original Articles

α-SUBSTITUIERTE PHOSPHONATE 65.1 SYNTHESE DER METHANTRISPHOSPHONSÄURE

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Pages 203-207 | Received 07 Jun 1993, Published online: 23 Sep 2006
 

Abstract

Durch Reaktion des Methanbisphosphonsäuretetraethylesters 9 mit NaH/Phosphorigsäurediethylesterchlorid und anschließender Oxidation mit Luftsauerstoff ist der Methantrisphosphonsäurehexaethylester 10 in mäßiger Ausbeute, aber in reiner Form zugänglich. Die gleiche Verbindung entsteht aus Bis-(diethylphosphono)diazomethan 11 mit Diethylphosphit in Gegenwart von Cu-Acetylacetonat. 10 kann mittels BTMS/H2O in die Trisphosphonsäure 13 überführt werden, die sich als stabile Verbindung erwies.

By reaction of methanebisphosphonate 9 with NaH/diethyl chlorophosphite and in situ oxidation with atmospheric oxygen the methanetrisphosphonic acid hexaethylester 10 in moderate yields, but in pure form is available. The same product is formed from tetraethyl diazomethane diphosphonate 11 and diethylphosphite in presence of Cu-acetylacetonate. 10 can be transformed using the BTMS/H2O-method to the trisphosphonic acid 13, which is a stable compound.

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