Synthesis and some properties of D-myo-inositol 1,4,5-tris(dihydrogen phosphate)

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Abstract
Optically active myo-inositol 1,4,5-tris(dihydrogen phosphate)1, which has now been recognized as a second messenger in a new intracellular signal transduction system, has been prepared starting from myo-inositol. The key step, phosphorylation of an adequately protected polyhydroxy derivative, was accomplished by three methods, among which a phosphoramidite method using a new phos-phitylating agent, o-xylylene N,N-diethylphosphoramidite, gave the triphosphoric ester in quantitative yield. Optical resolution was effectively realized by derivatization into diastereoisomeric l-menthoxyacetic esters. NMR spectra and optical rotation are shown to depend on the pH of an aqueous solution of compound 1.

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