PREPARATION, DERIVATIZATION WITH TRIMETHYLSILYLDIAZOMETHANE, AND GC/MS ANALYSIS OF A “POOL” OF ALKYL METHYLPHOSPHONIC ACIDS FOR USE AS QUALITATIVE STANDARDS IN SUPPORT OF COUNTERTERRORISM AND THE CHEMICAL WEAPONS CONVENTION
作者:Michael D. Crenshaw、David B. Cummings
DOI:10.1080/10426500490459632
日期:2004.6
There are hundreds of nerve agents in the class of alkyl methylphosphonofluoridates covered by Schedule 1 of the CWC (Chemical Weapons Convention). Hydrolysis of these sarin-like nerve agents results in all equal number of alkyl methylphosphonic acids. These allkyl methylphosphonic acids are persistent and provide good evidence of specific agent production or use. In order to support the CWC and counterterrorism activities, it is desirable to have ready access to each of these hydrolysis products for use as qualitative standards. A means for simultaneously producing multiple alkyl methylphosphonates from methylphosphonic acid and the corresponding alcohols was developed. Derivatization of these alkyl methylphosphonic acids with trimethylsilyldiazomethane yields the corresponding methyl esters which are suitable for GC/MS analysis.
Petrov,K.A. et al., Journal of general chemistry of the USSR, 1965, vol. 35, p. 723 - 726
作者:Petrov,K.A. et al.
DOI:——
日期:——
SYNTHESIS OF ALKYL- AND ARYLPHOSPHONIC ACID MONOESTERS BY DIRECT ESTERIFICATION OF DIBASIC PHOSPHONIC ACIDS IN THE PRESENCE OF AN ARSONIC ACID CATALYST
作者:Michael D. Crenshaw
DOI:10.1080/10426500490464032
日期:2004.8
the monochloro monoester, or alcoholysis of a phosphonicacid anhydride generally is used to prepare monoesters of alkyl- and arylphosphonic acids. Limited cases have been reported for the esterification of a dibasic phosphonicacid to yield the monoester, and none of these methods are as simple as the analogous method for preparing carboxylic acid esters, in which the carboxylic acid is esterified