Myelography iodinated contrast media. I. Unraveling the atropisomerism properties in solution.

Abstract:

:The present work reports a thorough conformational analysis of iodinated contrast media: iomeprol, iopamidol (the world's most utilized contrast agent), and iopromide. Its main aim is the understanding of the complex structural features of these atropisomeric molecules, characterized by the presence of many conformers with hindered rotations, and of the role of atropisomerism in the physicochemical properties of their aqueous solutions. The problem was tackled by using an extensive analysis of (13)C NMR data on the solutions of whole molecules and of simple precursors in addition to FT-IR investigation and molecular simulations. This analysis demonstrated that out of the many possible atropisomers, only a few are significantly populated, and their relative population is provided. The conformational analysis also indicated that the presence of a sterically hindered amidic bond, allowing a significant population of cis forms (E in iopromide and exo in iomeprol), may be the basis for an increased thermodynamic solubility of concentrated solutions of iomeprol.

journal_name

Mol Pharm

journal_title

Molecular pharmaceutics

authors

Fontanive L,D'Amelio N,Cesàro A,Gamini A,Tavagnacco L,Paolantoni M,Brady JW,Maiocchi A,Uggeri F

doi

10.1021/mp5007486

subject

Has Abstract

pub_date

2015-06-01 00:00:00

pages

1939-50

issue

6

eissn

1543-8384

issn

1543-8392

journal_volume

12

pub_type

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