Microwave assisted high yielding preparation of N-protected 2′-deoxyribonucleosides useful for oligonucleotide synthesis

A rapid and high yielding method for the synthesis of precursors of synthons for DNA synthesis, N-protected 2'-deoxyribonucleosides is described, which occur under mild conditions using microwave irradiation. The desired material, N-protected nucleosides, was obtained in 93-96% yield in few minutes. The final products were then characterized by H-1-NMR and MALDI-TOF and compared with the standard samples. The method is amenable to small to moderate scale of synthesis.