Fang H, Fang MJ, Zhu CJ, Liu LN, Zhao YF. Study on [(4-substituted benzoylamino)phenylmethyl]phosphonic acid diisopropyl esters under electrospray ionization tandem mass spectrometric conditions.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2007;
21:3629-3634. [PMID:
17939158 DOI:
10.1002/rcm.3184]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Phosphonate esters were synthesized and investigated by positive ion electrospray ionization mass spectrometry (ESI-MS) in conjunction with tandem mass spectrometry (MS/MS). It was found that for the sodiated adduct there were two novel rearrangement reactions, in which the phosphoryl oxygen atom migrated to the carbonyl carbon and a cleavage occurred at the amide bond, or a benzylamine fragment was lost and the phosphorus was reduced. However, when the methyl group substituted for the isopropyl group, these migrations were inhibited. A possible mechanism was proposed, and high-resolution mass spectrometry was applied to identify the formula of these novel ions. These results showed that ESI-MS is a useful tool for the structural determination of phosphonate esters.
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