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Phosphorus, Sulfur, and Silicon and the Related Elements Volume 190, 2015 - Issue 12: Robert Holmes Special Issue
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Original Articles

The Preparation and Spectroscopic Characterization of Chloroalkyl- and Chlorobenzyl-Aminobis(Methylenephosphonic Acids)

Harry R. HudsonFaculty of Life Sciences and Computing, London Metropolitan University, 166-220 Holloway Road, London, N7 8DB, UKCorrespondence[email protected]
,
Sia N. KoromaFaculty of Life Sciences and Computing, London Metropolitan University, 166-220 Holloway Road, London, N7 8DB, UK
&
Isaac A. O. OjoDepartment of Chemistry, Obafemi Awolowo University, Ile-Ife, Nigeria
Pages 2187-2193 | Received 05 Jul 2015, Accepted 28 Jul 2015, Published online: 10 Dec 2015
 
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GRAPHICAL ABSTRACT

Abstract

A series of chloroalkyl- and chlorobenzyl-aminobis(methylenephosphonic acids) has been prepared by the interaction of the corresponding chloroalkylamines or chlorobenzylamines with two equivalents each of formaldehyde and phosphorous acid in the presence of hydrochloric acid. Attempts to prepare bromoalkyl analogues gave only the chloro derivatives, resulting from halogen exchange. Compounds were characterized by carbon-13 NMR spectroscopy and fast atom bombardment mass spectrometry for which the major fragmentation pathways are reported. Preliminary screening has not revealed significant biological activity.

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