Synthetic Communications p. 3393 - 3399 (2006)
Update date:2022-08-16
Topics:
Kore, Anilkumar R.
Parmar, Gaurang
The reaction of ribonucleoside-5′-phosphoroimidazolide with a tributylammonium orthophosphate in anhydrous dimethylformamide at room temperature provides a general method for the synthesis of nucleoside-5′- diphosphate. The novelty of the approach is to use the triethylammonium salt of 5′-monophosphate nucleoside derivative prior to the imidazolate reaction with imidazole, triphenylphosphine, and 2,2′-dithiodipyridine. Deprotection, followed by displacement of the imidazole moiety using tributylammonium orthophosphate and a catalytic amount of zinc chloride in dimethylformamide gave the desired 5′-diphosphate products. The triethyl ammonium salt of 5′-diphosphate nucleosides was purified by flash chromatography using DEAE (diethylaminoethyl weak anion exchange resin) Sepharosa fast flow packed in an XK 50/60 column on an Akta FPLC (Fast Protein Liquid Chromatography). Synthesis procedures are reported for adenosine-5′-diphosphate, uridine-5′-diphosphate, cytidine-5′-diphosphate, and guanosine-5′-diphosphate. Yields for the displacement reactions ranged from 95 to 97%. Thus, this method offers the advantages of shorter reaction time, greater product yield, and a more cost-effective synthetic route. Copyright Taylor & Francis Group, LLC.
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