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New and rapid syntheses of the enantiomeric intracellular signalling molecules d-myo-inositol 1,4,5,6-tetrakisphosphate (1 a) and D-myo-inositol 3,4,5,6-tetrakisphosphate (1 b) are described. The synthetic strategy employs the novel butane-2,3-diacetal-protected (BDA-protected) myo-inositol (+/-)-3 ab, directly accessible from myo-inositol on a large scale, and an optical resolution with diastereoisomeric (R)-(-)-acetylmandelate esters. The X-ray crystal structure of (+/-)-4, an unusual side product of acid-catalysed reaction of myo-inositol with butanedione is also presented, and the absolute configurations of 1 a and 1 b are definitively assigned by conversion of key precursors into (+)-bornesitol and L-iditol hexaacetate, respectively. Biological activity of synthetic 1 b was confirmed in comparison with the natural polyphosphate.

Original publication

DOI

10.1002/chem.200305207

Type

Journal article

Journal

Chemistry

Publication Date

15/12/2003

Volume

9

Pages

6207 - 6214

Keywords

Acetals, Acetates, Animals, Butanes, Catalysis, Enzyme Inhibitors, Epoxy Compounds, Inositol, Inositol Phosphates, Models, Chemical, Molecular Structure, Stereoisomerism, Sugar Alcohols