One pot solution synthesis of cyclic oligodeoxyribonucleotides

Abstract
Several cyclic oligodeoxynucleotides with different base composition and size have been prepared from 5′,3′-unprotected linear precursors, using a bifunctional phosphorylating reagent. The final deprotected ollgomers have been characterized by 1 H- and 31 P-NMR. The present procedure is particularly useful for millimolar scale syntheses.