Abstract
An efficient and economical method for the solid-phase synthesis of oligodeoxyribonucleotides and their phosphorothioate analogues is described. The method entails the use of the 4-oxopentyl group for phosphate/thiophosphate protection. Post-synthesis removal of the protecting group is easily and rapidly achieved under mild conditions at ambient temperature using either pressurized gaseous amines or concentrated ammonium hydroxide.
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