Synthesis of 2′-C-β-Methyl-2′-deoxyguanosine

We describe two approaches for the synthesis of 2'-C-beta-methyl-2'-deoxyguanosine (3) via 2'-radical deoxygenation. One approach starts from 1,3,5-tri-O-benzoyl-alpha-d-ribofuranose (6) and gives 3 in 11 steps with 9.7% overall yield. The second approach starts from guanosine and gives 3 in 8 steps with 23% overall yield.